Finding the Fourth Proportional to 9,510.80, 13,125.24 and 7,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510.80 : 13,125.24 = 7,148.72 : x
2. Step 2: Convert to fraction form
   9,510.80/13,125.24 = 7,148.72/x
3. Step 3: Cross multiply
   9,510.80x = 13,125.24 × 7,148.72
4. Step 4: Simplify right side
   9,510.80x = 93,828,665.69
5. Step 5: Solve for x
   x = 93,828,665.69/9,510.80
6. Step 6: Final answer
   x = 9,865.49