Finding the Fourth Proportional to 23,395.32, 32,285.56 and 12,640.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,395.32 : 32,285.56 = 12,640.20 : x
2. Step 2: Convert to fraction form
   23,395.32/32,285.56 = 12,640.20/x
3. Step 3: Cross multiply
   23,395.32x = 32,285.56 × 12,640.20
4. Step 4: Simplify right side
   23,395.32x = 408,095,935.51
5. Step 5: Solve for x
   x = 408,095,935.51/23,395.32
6. Step 6: Final answer
   x = 17,443.49