Finding the Fourth Proportional to 99,610.43, 149,371.55 and 28,516.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99,610.43 : 149,371.55 = 28,516.86 : x
2. Step 2: Convert to fraction form
   99,610.43/149,371.55 = 28,516.86/x
3. Step 3: Cross multiply
   99,610.43x = 149,371.55 × 28,516.86
4. Step 4: Simplify right side
   99,610.43x = 4,259,608,044.00
5. Step 5: Solve for x
   x = 4,259,608,044.00/99,610.43
6. Step 6: Final answer
   x = 42,762.67