Finding the Fourth Proportional to 8,109.38, 12,148.31 and 5,327.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.38 : 12,148.31 = 5,327.61 : x
2. Step 2: Convert to fraction form
   8,109.38/12,148.31 = 5,327.61/x
3. Step 3: Cross multiply
   8,109.38x = 12,148.31 × 5,327.61
4. Step 4: Simplify right side
   8,109.38x = 64,721,425.60
5. Step 5: Solve for x
   x = 64,721,425.60/8,109.38
6. Step 6: Final answer
   x = 7,981.05