Finding the Fourth Proportional to 91,516.72, 125,911.92 and 80,714.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,516.72 : 125,911.92 = 80,714.56 : x
2. Step 2: Convert to fraction form
   91,516.72/125,911.92 = 80,714.56/x
3. Step 3: Cross multiply
   91,516.72x = 125,911.92 × 80,714.56
4. Step 4: Simplify right side
   91,516.72x = 10,162,925,221.56
5. Step 5: Solve for x
   x = 10,162,925,221.56/91,516.72
6. Step 6: Final answer
   x = 111,049.93