Finding the Fourth Proportional to 91,292.63, 126,018.98 and 81,715.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,292.63 : 126,018.98 = 81,715.62 : x
2. Step 2: Convert to fraction form
   91,292.63/126,018.98 = 81,715.62/x
3. Step 3: Cross multiply
   91,292.63x = 126,018.98 × 81,715.62
4. Step 4: Simplify right side
   91,292.63x = 10,297,718,673.89
5. Step 5: Solve for x
   x = 10,297,718,673.89/91,292.63
6. Step 6: Final answer
   x = 112,799.02