Finding the Fourth Proportional to 13,105.58, 18,091.82 and 8,392.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.58 : 18,091.82 = 8,392.55 : x
2. Step 2: Convert to fraction form
   13,105.58/18,091.82 = 8,392.55/x
3. Step 3: Cross multiply
   13,105.58x = 18,091.82 × 8,392.55
4. Step 4: Simplify right side
   13,105.58x = 151,836,434.46
5. Step 5: Solve for x
   x = 151,836,434.46/13,105.58
6. Step 6: Final answer
   x = 11,585.64