Finding the Fourth Proportional to 22,686.56, 31,310.72 and 13,612.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,686.56 : 31,310.72 = 13,612.33 : x
2. Step 2: Convert to fraction form
   22,686.56/31,310.72 = 13,612.33/x
3. Step 3: Cross multiply
   22,686.56x = 31,310.72 × 13,612.33
4. Step 4: Simplify right side
   22,686.56x = 426,211,815.95
5. Step 5: Solve for x
   x = 426,211,815.95/22,686.56
6. Step 6: Final answer
   x = 18,786.98