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Finding the Fourth Proportional to 217,528.28, 325,906.18 and 90,889.74

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Solution

The fourth proportional to 217,528.28, 325,906.18 and 90,889.74 is: 136,173.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,528.28 : 325,906.18 = 90,889.74 : x
  2. Step 2: Convert to fraction form
    217,528.28/325,906.18 = 90,889.74/x
  3. Step 3: Cross multiply
    217,528.28x = 325,906.18 × 90,889.74
  4. Step 4: Simplify right side
    217,528.28x = 29,621,528,248.62
  5. Step 5: Solve for x
    x = 29,621,528,248.62/217,528.28
  6. Step 6: Final answer
    x = 136,173.23

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