Finding the Fourth Proportional to 23,280, 32,128.32 and 13,345.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,280 : 32,128.32 = 13,345.92 : x
2. Step 2: Convert to fraction form
   23,280/32,128.32 = 13,345.92/x
3. Step 3: Cross multiply
   23,280x = 32,128.32 × 13,345.92
4. Step 4: Simplify right side
   23,280x = 428,781,988.45
5. Step 5: Solve for x
   x = 428,781,988.45/23,280
6. Step 6: Final answer
   x = 18,418.47