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Finding the Fourth Proportional to 216,430.92, 324,646.20 and 142,021.80

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Solution

The fourth proportional to 216,430.92, 324,646.20 and 142,021.80 is: 213,032.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,430.92 : 324,646.20 = 142,021.80 : x
  2. Step 2: Convert to fraction form
    216,430.92/324,646.20 = 142,021.80/x
  3. Step 3: Cross multiply
    216,430.92x = 324,646.20 × 142,021.80
  4. Step 4: Simplify right side
    216,430.92x = 46,106,837,687.16
  5. Step 5: Solve for x
    x = 46,106,837,687.16/216,430.92
  6. Step 6: Final answer
    x = 213,032.58

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