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Finding the Fourth Proportional to 128,691.89, 192,972.02 and 53,791.59

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Solution

The fourth proportional to 128,691.89, 192,972.02 and 53,791.59 is: 80,659.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,691.89 : 192,972.02 = 53,791.59 : x
  2. Step 2: Convert to fraction form
    128,691.89/192,972.02 = 53,791.59/x
  3. Step 3: Cross multiply
    128,691.89x = 192,972.02 × 53,791.59
  4. Step 4: Simplify right side
    128,691.89x = 10,380,271,512.35
  5. Step 5: Solve for x
    x = 10,380,271,512.35/128,691.89
  6. Step 6: Final answer
    x = 80,659.88

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