Finding the Fourth Proportional to 21,142.98, 31,716.34 and 5,560.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.98 : 31,716.34 = 5,560.61 : x
2. Step 2: Convert to fraction form
   21,142.98/31,716.34 = 5,560.61/x
3. Step 3: Cross multiply
   21,142.98x = 31,716.34 × 5,560.61
4. Step 4: Simplify right side
   21,142.98x = 176,362,024.88
5. Step 5: Solve for x
   x = 176,362,024.88/21,142.98
6. Step 6: Final answer
   x = 8,341.40