Finding the Fourth Proportional to 9,513.29, 13,128.21 and 5,321.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.29 : 13,128.21 = 5,321.54 : x
2. Step 2: Convert to fraction form
   9,513.29/13,128.21 = 5,321.54/x
3. Step 3: Cross multiply
   9,513.29x = 13,128.21 × 5,321.54
4. Step 4: Simplify right side
   9,513.29x = 69,862,327.46
5. Step 5: Solve for x
   x = 69,862,327.46/9,513.29
6. Step 6: Final answer
   x = 7,343.65