Finding the Fourth Proportional to 21,250.76, 31,879.98 and 8,763.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,250.76 : 31,879.98 = 8,763.83 : x
2. Step 2: Convert to fraction form
   21,250.76/31,879.98 = 8,763.83/x
3. Step 3: Cross multiply
   21,250.76x = 31,879.98 × 8,763.83
4. Step 4: Simplify right side
   21,250.76x = 279,390,685.27
5. Step 5: Solve for x
   x = 279,390,685.27/21,250.76
6. Step 6: Final answer
   x = 13,147.33