Finding the Fourth Proportional to 23,275.92, 32,120.78 and 12,665.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,275.92 : 32,120.78 = 12,665.60 : x
2. Step 2: Convert to fraction form
   23,275.92/32,120.78 = 12,665.60/x
3. Step 3: Cross multiply
   23,275.92x = 32,120.78 × 12,665.60
4. Step 4: Simplify right side
   23,275.92x = 406,828,727.24
5. Step 5: Solve for x
   x = 406,828,727.24/23,275.92
6. Step 6: Final answer
   x = 17,478.52