Finding the Fourth Proportional to 8,920, 12,308.32 and 5,731.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920 : 12,308.32 = 5,731.52 : x
2. Step 2: Convert to fraction form
   8,920/12,308.32 = 5,731.52/x
3. Step 3: Cross multiply
   8,920x = 12,308.32 × 5,731.52
4. Step 4: Simplify right side
   8,920x = 70,545,382.25
5. Step 5: Solve for x
   x = 70,545,382.25/8,920
6. Step 6: Final answer
   x = 7,908.68