Finding the Fourth Proportional to 21,132.43, 29,131.69 and 16,087.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,132.43 : 29,131.69 = 16,087.87 : x
2. Step 2: Convert to fraction form
   21,132.43/29,131.69 = 16,087.87/x
3. Step 3: Cross multiply
   21,132.43x = 29,131.69 × 16,087.87
4. Step 4: Simplify right side
   21,132.43x = 468,666,841.60
5. Step 5: Solve for x
   x = 468,666,841.60/21,132.43
6. Step 6: Final answer
   x = 22,177.61