Finding the Fourth Proportional to 21,223.89, 31,837.46 and 5,641.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.89 : 31,837.46 = 5,641.11 : x
2. Step 2: Convert to fraction form
   21,223.89/31,837.46 = 5,641.11/x
3. Step 3: Cross multiply
   21,223.89x = 31,837.46 × 5,641.11
4. Step 4: Simplify right side
   21,223.89x = 179,598,585.78
5. Step 5: Solve for x
   x = 179,598,585.78/21,223.89
6. Step 6: Final answer
   x = 8,462.10