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Finding the Fourth Proportional to 1,318,666.16, 1,978,354.34 and 678,621.12

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Solution

The fourth proportional to 1,318,666.16, 1,978,354.34 and 678,621.12 is: 1,018,114.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,666.16 : 1,978,354.34 = 678,621.12 : x
  2. Step 2: Convert to fraction form
    1,318,666.16/1,978,354.34 = 678,621.12/x
  3. Step 3: Cross multiply
    1,318,666.16x = 1,978,354.34 × 678,621.12
  4. Step 4: Simplify right side
    1,318,666.16x = 1,342,553,037,967.66
  5. Step 5: Solve for x
    x = 1,342,553,037,967.66/1,318,666.16
  6. Step 6: Final answer
    x = 1,018,114.42

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