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Finding the Fourth Proportional to 78,197.28, 107,911.62 and 42,386.34

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Solution

The fourth proportional to 78,197.28, 107,911.62 and 42,386.34 is: 58,492.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,197.28 : 107,911.62 = 42,386.34 : x
  2. Step 2: Convert to fraction form
    78,197.28/107,911.62 = 42,386.34/x
  3. Step 3: Cross multiply
    78,197.28x = 107,911.62 × 42,386.34
  4. Step 4: Simplify right side
    78,197.28x = 4,573,978,615.27
  5. Step 5: Solve for x
    x = 4,573,978,615.27/78,197.28
  6. Step 6: Final answer
    x = 58,492.81

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