Finding the Fourth Proportional to 23,290.49, 32,140.88 and 12,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   23,290.49 : 32,140.88 = 12,680.16 : x
2. Step 2: Convert to fraction form
   23,290.49/32,140.88 = 12,680.16/x
3. Step 3: Cross multiply
   23,290.49x = 32,140.88 × 12,680.16
4. Step 4: Simplify right side
   23,290.49x = 407,551,532.64
5. Step 5: Solve for x
   x = 407,551,532.64/23,290.49
6. Step 6: Final answer
   x = 17,498.63