Finding the Fourth Proportional to 13,186.31, 18,193.86 and 8,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,186.31 : 18,193.86 = 8,150.72 : x
2. Step 2: Convert to fraction form
   13,186.31/18,193.86 = 8,150.72/x
3. Step 3: Cross multiply
   13,186.31x = 18,193.86 × 8,150.72
4. Step 4: Simplify right side
   13,186.31x = 148,292,967.61
5. Step 5: Solve for x
   x = 148,292,967.61/13,186.31
6. Step 6: Final answer
   x = 11,245.98