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Finding the Fourth Proportional to 39,015.79, 53,841.78 and 21,110.81

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Solution

The fourth proportional to 39,015.79, 53,841.78 and 21,110.81 is: 29,132.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,015.79 : 53,841.78 = 21,110.81 : x
  2. Step 2: Convert to fraction form
    39,015.79/53,841.78 = 21,110.81/x
  3. Step 3: Cross multiply
    39,015.79x = 53,841.78 × 21,110.81
  4. Step 4: Simplify right side
    39,015.79x = 1,136,643,318.43
  5. Step 5: Solve for x
    x = 1,136,643,318.43/39,015.79
  6. Step 6: Final answer
    x = 29,132.91

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