Finding the Fourth Proportional to 21,308.91, 31,963.34 and 5,726.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,308.91 : 31,963.34 = 5,726.54 : x
2. Step 2: Convert to fraction form
   21,308.91/31,963.34 = 5,726.54/x
3. Step 3: Cross multiply
   21,308.91x = 31,963.34 × 5,726.54
4. Step 4: Simplify right side
   21,308.91x = 183,039,156.59
5. Step 5: Solve for x
   x = 183,039,156.59/21,308.91
6. Step 6: Final answer
   x = 8,589.79