Finding the Fourth Proportional to 9,510.72, 13,129.20 and 5,530.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510.72 : 13,129.20 = 5,530.38 : x
2. Step 2: Convert to fraction form
   9,510.72/13,129.20 = 5,530.38/x
3. Step 3: Cross multiply
   9,510.72x = 13,129.20 × 5,530.38
4. Step 4: Simplify right side
   9,510.72x = 72,609,465.10
5. Step 5: Solve for x
   x = 72,609,465.10/9,510.72
6. Step 6: Final answer
   x = 7,634.49