Finding the Fourth Proportional to 8,789.40, 12,152.70 and 7,682.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.40 : 12,152.70 = 7,682.24 : x
2. Step 2: Convert to fraction form
   8,789.40/12,152.70 = 7,682.24/x
3. Step 3: Cross multiply
   8,789.40x = 12,152.70 × 7,682.24
4. Step 4: Simplify right side
   8,789.40x = 93,359,988.43
5. Step 5: Solve for x
   x = 93,359,988.43/8,789.40
6. Step 6: Final answer
   x = 10,621.88