Finding the Fourth Proportional to 8,789.96, 13,118.20 and 8,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.96 : 13,118.20 = 8,432.72 : x
2. Step 2: Convert to fraction form
   8,789.96/13,118.20 = 8,432.72/x
3. Step 3: Cross multiply
   8,789.96x = 13,118.20 × 8,432.72
4. Step 4: Simplify right side
   8,789.96x = 110,622,107.50
5. Step 5: Solve for x
   x = 110,622,107.50/8,789.96
6. Step 6: Final answer
   x = 12,585.05