Finding the Fourth Proportional to 9,520.74, 13,137.39 and 5,328.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,520.74 : 13,137.39 = 5,328.99 : x
2. Step 2: Convert to fraction form
   9,520.74/13,137.39 = 5,328.99/x
3. Step 3: Cross multiply
   9,520.74x = 13,137.39 × 5,328.99
4. Step 4: Simplify right side
   9,520.74x = 70,009,019.94
5. Step 5: Solve for x
   x = 70,009,019.94/9,520.74
6. Step 6: Final answer
   x = 7,353.32