Finding the Fourth Proportional to 21,568.88, 29,755 and 12,616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,568.88 : 29,755 = 12,616.72 : x
2. Step 2: Convert to fraction form
   21,568.88/29,755 = 12,616.72/x
3. Step 3: Cross multiply
   21,568.88x = 29,755 × 12,616.72
4. Step 4: Simplify right side
   21,568.88x = 375,410,503.60
5. Step 5: Solve for x
   x = 375,410,503.60/21,568.88
6. Step 6: Final answer
   x = 17,405.19