Finding the Fourth Proportional to 9,521.28, 13,139.76 and 5,329.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.28 : 13,139.76 = 5,329.56 : x
2. Step 2: Convert to fraction form
   9,521.28/13,139.76 = 5,329.56/x
3. Step 3: Cross multiply
   9,521.28x = 13,139.76 × 5,329.56
4. Step 4: Simplify right side
   9,521.28x = 70,029,139.31
5. Step 5: Solve for x
   x = 70,029,139.31/9,521.28
6. Step 6: Final answer
   x = 7,355.01