Finding the Fourth Proportional to 9,500.71, 13,111.49 and 5,725.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,500.71 : 13,111.49 = 5,725.07 : x
2. Step 2: Convert to fraction form
   9,500.71/13,111.49 = 5,725.07/x
3. Step 3: Cross multiply
   9,500.71x = 13,111.49 × 5,725.07
4. Step 4: Simplify right side
   9,500.71x = 75,064,198.05
5. Step 5: Solve for x
   x = 75,064,198.05/9,500.71
6. Step 6: Final answer
   x = 7,900.90