Finding the Fourth Proportional to 11,811.91, 16,315.96 and 8,822.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,811.91 : 16,315.96 = 8,822.55 : x
2. Step 2: Convert to fraction form
   11,811.91/16,315.96 = 8,822.55/x
3. Step 3: Cross multiply
   11,811.91x = 16,315.96 × 8,822.55
4. Step 4: Simplify right side
   11,811.91x = 143,948,397.25
5. Step 5: Solve for x
   x = 143,948,397.25/11,811.91
6. Step 6: Final answer
   x = 12,186.72