Finding the Fourth Proportional to 9,499.51, 13,108.44 and 5,520.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.51 : 13,108.44 = 5,520.57 : x
2. Step 2: Convert to fraction form
   9,499.51/13,108.44 = 5,520.57/x
3. Step 3: Cross multiply
   9,499.51x = 13,108.44 × 5,520.57
4. Step 4: Simplify right side
   9,499.51x = 72,366,060.61
5. Step 5: Solve for x
   x = 72,366,060.61/9,499.51
6. Step 6: Final answer
   x = 7,617.87