Finding the Fourth Proportional to 23,290.40, 32,140.67 and 12,680.03

Step by Step Solution

1. Step 1: Write the proportion equation
   23,290.40 : 32,140.67 = 12,680.03 : x
2. Step 2: Convert to fraction form
   23,290.40/32,140.67 = 12,680.03/x
3. Step 3: Cross multiply
   23,290.40x = 32,140.67 × 12,680.03
4. Step 4: Simplify right side
   23,290.40x = 407,544,435.72
5. Step 5: Solve for x
   x = 407,544,435.72/23,290.40
6. Step 6: Final answer
   x = 17,498.39