Finding the Fourth Proportional to 22,715.92, 34,061.52 and 7,920.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,715.92 : 34,061.52 = 7,920.88 : x
2. Step 2: Convert to fraction form
   22,715.92/34,061.52 = 7,920.88/x
3. Step 3: Cross multiply
   22,715.92x = 34,061.52 × 7,920.88
4. Step 4: Simplify right side
   22,715.92x = 269,797,212.54
5. Step 5: Solve for x
   x = 269,797,212.54/22,715.92
6. Step 6: Final answer
   x = 11,877.01