Finding the Fourth Proportional to 21,141.97, 31,710.43 and 5,560.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,141.97 : 31,710.43 = 5,560.81 : x
2. Step 2: Convert to fraction form
   21,141.97/31,710.43 = 5,560.81/x
3. Step 3: Cross multiply
   21,141.97x = 31,710.43 × 5,560.81
4. Step 4: Simplify right side
   21,141.97x = 176,335,489.89
5. Step 5: Solve for x
   x = 176,335,489.89/21,141.97
6. Step 6: Final answer
   x = 8,340.54