Finding the Fourth Proportional to 23,291.12, 32,140.68 and 12,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,291.12 : 32,140.68 = 12,680.72 : x
2. Step 2: Convert to fraction form
   23,291.12/32,140.68 = 12,680.72/x
3. Step 3: Cross multiply
   23,291.12x = 32,140.68 × 12,680.72
4. Step 4: Simplify right side
   23,291.12x = 407,566,996.49
5. Step 5: Solve for x
   x = 407,566,996.49/23,291.12
6. Step 6: Final answer
   x = 17,498.81