Finding the Fourth Proportional to 23,290.78, 32,140.46 and 12,680.24

Step by Step Solution

1. Step 1: Write the proportion equation
   23,290.78 : 32,140.46 = 12,680.24 : x
2. Step 2: Convert to fraction form
   23,290.78/32,140.46 = 12,680.24/x
3. Step 3: Cross multiply
   23,290.78x = 32,140.46 × 12,680.24
4. Step 4: Simplify right side
   23,290.78x = 407,548,746.51
5. Step 5: Solve for x
   x = 407,548,746.51/23,290.78
6. Step 6: Final answer
   x = 17,498.29