Finding the Fourth Proportional to 91,861.99, 137,792.93 and 28,687.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,861.99 : 137,792.93 = 28,687.52 : x
2. Step 2: Convert to fraction form
   91,861.99/137,792.93 = 28,687.52/x
3. Step 3: Cross multiply
   91,861.99x = 137,792.93 × 28,687.52
4. Step 4: Simplify right side
   91,861.99x = 3,952,937,743.86
5. Step 5: Solve for x
   x = 3,952,937,743.86/91,861.99
6. Step 6: Final answer
   x = 43,031.27