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Finding the Fourth Proportional to 1,318,664.16, 1,978,351.33 and 678,619.12

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Solution

The fourth proportional to 1,318,664.16, 1,978,351.33 and 678,619.12 is: 1,018,111.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,664.16 : 1,978,351.33 = 678,619.12 : x
  2. Step 2: Convert to fraction form
    1,318,664.16/1,978,351.33 = 678,619.12/x
  3. Step 3: Cross multiply
    1,318,664.16x = 1,978,351.33 × 678,619.12
  4. Step 4: Simplify right side
    1,318,664.16x = 1,342,547,038,615.43
  5. Step 5: Solve for x
    x = 1,342,547,038,615.43/1,318,664.16
  6. Step 6: Final answer
    x = 1,018,111.42

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