Finding the Fourth Proportional to 21,142.59, 31,711.37 and 5,561.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.59 : 31,711.37 = 5,561.43 : x
2. Step 2: Convert to fraction form
   21,142.59/31,711.37 = 5,561.43/x
3. Step 3: Cross multiply
   21,142.59x = 31,711.37 × 5,561.43
4. Step 4: Simplify right side
   21,142.59x = 176,360,536.65
5. Step 5: Solve for x
   x = 176,360,536.65/21,142.59
6. Step 6: Final answer
   x = 8,341.48