Finding the Fourth Proportional to 9,513.18, 13,128.21 and 5,264.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.18 : 13,128.21 = 5,264.55 : x
2. Step 2: Convert to fraction form
   9,513.18/13,128.21 = 5,264.55/x
3. Step 3: Cross multiply
   9,513.18x = 13,128.21 × 5,264.55
4. Step 4: Simplify right side
   9,513.18x = 69,114,117.96
5. Step 5: Solve for x
   x = 69,114,117.96/9,513.18
6. Step 6: Final answer
   x = 7,265.09