Finding the Fourth Proportional to 9,520.89, 13,139.23 and 5,271.95

Step by Step Solution

1. Step 1: Write the proportion equation
   9,520.89 : 13,139.23 = 5,271.95 : x
2. Step 2: Convert to fraction form
   9,520.89/13,139.23 = 5,271.95/x
3. Step 3: Cross multiply
   9,520.89x = 13,139.23 × 5,271.95
4. Step 4: Simplify right side
   9,520.89x = 69,269,297.90
5. Step 5: Solve for x
   x = 69,269,297.90/9,520.89
6. Step 6: Final answer
   x = 7,275.51