Finding the Fourth Proportional to 9,521.68, 13,139.04 and 5,329.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.68 : 13,139.04 = 5,329.12 : x
2. Step 2: Convert to fraction form
   9,521.68/13,139.04 = 5,329.12/x
3. Step 3: Cross multiply
   9,521.68x = 13,139.04 × 5,329.12
4. Step 4: Simplify right side
   9,521.68x = 70,019,520.84
5. Step 5: Solve for x
   x = 70,019,520.84/9,521.68
6. Step 6: Final answer
   x = 7,353.69