Finding the Fourth Proportional to 13,131.60, 18,105.48 and 8,154.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.60 : 18,105.48 = 8,154.96 : x
2. Step 2: Convert to fraction form
   13,131.60/18,105.48 = 8,154.96/x
3. Step 3: Cross multiply
   13,131.60x = 18,105.48 × 8,154.96
4. Step 4: Simplify right side
   13,131.60x = 147,649,465.18
5. Step 5: Solve for x
   x = 147,649,465.18/13,131.60
6. Step 6: Final answer
   x = 11,243.83