Finding the Fourth Proportional to 21,443.60, 32,197.72 and 17,512.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.60 : 32,197.72 = 17,512.40 : x
2. Step 2: Convert to fraction form
   21,443.60/32,197.72 = 17,512.40/x
3. Step 3: Cross multiply
   21,443.60x = 32,197.72 × 17,512.40
4. Step 4: Simplify right side
   21,443.60x = 563,859,351.73
5. Step 5: Solve for x
   x = 563,859,351.73/21,443.60
6. Step 6: Final answer
   x = 26,294.99