Finding the Fourth Proportional to 23,290.56, 32,139.90 and 12,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   23,290.56 : 32,139.90 = 12,680.16 : x
2. Step 2: Convert to fraction form
   23,290.56/32,139.90 = 12,680.16/x
3. Step 3: Cross multiply
   23,290.56x = 32,139.90 × 12,680.16
4. Step 4: Simplify right side
   23,290.56x = 407,539,074.38
5. Step 5: Solve for x
   x = 407,539,074.38/23,290.56
6. Step 6: Final answer
   x = 17,498.04