Finding the Fourth Proportional to 9,662.20, 14,508.15 and 5,288.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,662.20 : 14,508.15 = 5,288.20 : x
2. Step 2: Convert to fraction form
   9,662.20/14,508.15 = 5,288.20/x
3. Step 3: Cross multiply
   9,662.20x = 14,508.15 × 5,288.20
4. Step 4: Simplify right side
   9,662.20x = 76,721,998.83
5. Step 5: Solve for x
   x = 76,721,998.83/9,662.20
6. Step 6: Final answer
   x = 7,940.43