Finding the Fourth Proportional to 17,128.24, 23,627.64 and 12,404.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,128.24 : 23,627.64 = 12,404.32 : x
2. Step 2: Convert to fraction form
   17,128.24/23,627.64 = 12,404.32/x
3. Step 3: Cross multiply
   17,128.24x = 23,627.64 × 12,404.32
4. Step 4: Simplify right side
   17,128.24x = 293,084,807.40
5. Step 5: Solve for x
   x = 293,084,807.40/17,128.24
6. Step 6: Final answer
   x = 17,111.20