Finding the Fourth Proportional to 8,790.48, 12,131.67 and 5,253.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,790.48 : 12,131.67 = 5,253.61 : x
2. Step 2: Convert to fraction form
   8,790.48/12,131.67 = 5,253.61/x
3. Step 3: Cross multiply
   8,790.48x = 12,131.67 × 5,253.61
4. Step 4: Simplify right side
   8,790.48x = 63,735,062.83
5. Step 5: Solve for x
   x = 63,735,062.83/8,790.48
6. Step 6: Final answer
   x = 7,250.46