Finding the Fourth Proportional to 21,115.89, 29,151.50 and 14,411.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,115.89 : 29,151.50 = 14,411.52 : x
2. Step 2: Convert to fraction form
   21,115.89/29,151.50 = 14,411.52/x
3. Step 3: Cross multiply
   21,115.89x = 29,151.50 × 14,411.52
4. Step 4: Simplify right side
   21,115.89x = 420,117,353.22
5. Step 5: Solve for x
   x = 420,117,353.22/21,115.89
6. Step 6: Final answer
   x = 19,895.79