Finding the Fourth Proportional to 9,513.25, 13,128.33 and 5,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.25 : 13,128.33 = 5,321.50 : x
2. Step 2: Convert to fraction form
   9,513.25/13,128.33 = 5,321.50/x
3. Step 3: Cross multiply
   9,513.25x = 13,128.33 × 5,321.50
4. Step 4: Simplify right side
   9,513.25x = 69,862,408.10
5. Step 5: Solve for x
   x = 69,862,408.10/9,513.25
6. Step 6: Final answer
   x = 7,343.70