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Finding the Fourth Proportional to 428,634.60, 642,978.66 and 113,091.84

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Solution

The fourth proportional to 428,634.60, 642,978.66 and 113,091.84 is: 169,644.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,634.60 : 642,978.66 = 113,091.84 : x
  2. Step 2: Convert to fraction form
    428,634.60/642,978.66 = 113,091.84/x
  3. Step 3: Cross multiply
    428,634.60x = 642,978.66 × 113,091.84
  4. Step 4: Simplify right side
    428,634.60x = 72,715,639,740.13
  5. Step 5: Solve for x
    x = 72,715,639,740.13/428,634.60
  6. Step 6: Final answer
    x = 169,644.82

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