Finding the Fourth Proportional to 9,280.72, 12,807.56 and 5,088.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,280.72 : 12,807.56 = 5,088.92 : x
2. Step 2: Convert to fraction form
   9,280.72/12,807.56 = 5,088.92/x
3. Step 3: Cross multiply
   9,280.72x = 12,807.56 × 5,088.92
4. Step 4: Simplify right side
   9,280.72x = 65,176,648.24
5. Step 5: Solve for x
   x = 65,176,648.24/9,280.72
6. Step 6: Final answer
   x = 7,022.80