Finding the Fourth Proportional to 21,223.55, 31,835.29 and 5,641.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.55 : 31,835.29 = 5,641.18 : x
2. Step 2: Convert to fraction form
   21,223.55/31,835.29 = 5,641.18/x
3. Step 3: Cross multiply
   21,223.55x = 31,835.29 × 5,641.18
4. Step 4: Simplify right side
   21,223.55x = 179,588,413.86
5. Step 5: Solve for x
   x = 179,588,413.86/21,223.55
6. Step 6: Final answer
   x = 8,461.75