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Finding the Fourth Proportional to 428,103.55, 642,186.11 and 147,616.75

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Solution

The fourth proportional to 428,103.55, 642,186.11 and 147,616.75 is: 221,435.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,103.55 : 642,186.11 = 147,616.75 : x
  2. Step 2: Convert to fraction form
    428,103.55/642,186.11 = 147,616.75/x
  3. Step 3: Cross multiply
    428,103.55x = 642,186.11 × 147,616.75
  4. Step 4: Simplify right side
    428,103.55x = 94,797,426,453.34
  5. Step 5: Solve for x
    x = 94,797,426,453.34/428,103.55
  6. Step 6: Final answer
    x = 221,435.74

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