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Finding the Fourth Proportional to 66,978.56, 100,464.88 and 20,230

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Solution

The fourth proportional to 66,978.56, 100,464.88 and 20,230 is: 30,344.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.56 : 100,464.88 = 20,230 : x
  2. Step 2: Convert to fraction form
    66,978.56/100,464.88 = 20,230/x
  3. Step 3: Cross multiply
    66,978.56x = 100,464.88 × 20,230
  4. Step 4: Simplify right side
    66,978.56x = 2,032,404,522.40
  5. Step 5: Solve for x
    x = 2,032,404,522.40/66,978.56
  6. Step 6: Final answer
    x = 30,344.11

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