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Finding the Fourth Proportional to 428,060.80, 641,630.40 and 161,718.40

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Solution

The fourth proportional to 428,060.80, 641,630.40 and 161,718.40 is: 242,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,060.80 : 641,630.40 = 161,718.40 : x
  2. Step 2: Convert to fraction form
    428,060.80/641,630.40 = 161,718.40/x
  3. Step 3: Cross multiply
    428,060.80x = 641,630.40 × 161,718.40
  4. Step 4: Simplify right side
    428,060.80x = 103,763,441,679.36
  5. Step 5: Solve for x
    x = 103,763,441,679.36/428,060.80
  6. Step 6: Final answer
    x = 242,403.51

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