Finding the Fourth Proportional to 23,275.72, 32,120.60 and 12,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,275.72 : 32,120.60 = 12,665.28 : x
2. Step 2: Convert to fraction form
   23,275.72/32,120.60 = 12,665.28/x
3. Step 3: Cross multiply
   23,275.72x = 32,120.60 × 12,665.28
4. Step 4: Simplify right side
   23,275.72x = 406,816,392.77
5. Step 5: Solve for x
   x = 406,816,392.77/23,275.72
6. Step 6: Final answer
   x = 17,478.14