Finding the Fourth Proportional to 14,042.40, 21,057.72 and 5,716.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,042.40 : 21,057.72 = 5,716.76 : x
2. Step 2: Convert to fraction form
   14,042.40/21,057.72 = 5,716.76/x
3. Step 3: Cross multiply
   14,042.40x = 21,057.72 × 5,716.76
4. Step 4: Simplify right side
   14,042.40x = 120,381,826.10
5. Step 5: Solve for x
   x = 120,381,826.10/14,042.40
6. Step 6: Final answer
   x = 8,572.74