Finding the Fourth Proportional to 21,168.27, 31,754.57 and 5,585.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,168.27 : 31,754.57 = 5,585.90 : x
2. Step 2: Convert to fraction form
   21,168.27/31,754.57 = 5,585.90/x
3. Step 3: Cross multiply
   21,168.27x = 31,754.57 × 5,585.90
4. Step 4: Simplify right side
   21,168.27x = 177,377,665.86
5. Step 5: Solve for x
   x = 177,377,665.86/21,168.27
6. Step 6: Final answer
   x = 8,379.41