Finding the Fourth Proportional to 9,521.92, 13,139.52 and 5,329.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.92 : 13,139.52 = 5,329.60 : x
2. Step 2: Convert to fraction form
   9,521.92/13,139.52 = 5,329.60/x
3. Step 3: Cross multiply
   9,521.92x = 13,139.52 × 5,329.60
4. Step 4: Simplify right side
   9,521.92x = 70,028,385.79
5. Step 5: Solve for x
   x = 70,028,385.79/9,521.92
6. Step 6: Final answer
   x = 7,354.44