Finding the Fourth Proportional to 60,881.69, 91,331.65 and 21,431.86

Step by Step Solution

1. Step 1: Write the proportion equation
   60,881.69 : 91,331.65 = 21,431.86 : x
2. Step 2: Convert to fraction form
   60,881.69/91,331.65 = 21,431.86/x
3. Step 3: Cross multiply
   60,881.69x = 91,331.65 × 21,431.86
4. Step 4: Simplify right side
   60,881.69x = 1,957,406,934.83
5. Step 5: Solve for x
   x = 1,957,406,934.83/60,881.69
6. Step 6: Final answer
   x = 32,150.99