Finding the Fourth Proportional to 8,081.76, 12,117.27 and 3,151.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.76 : 12,117.27 = 3,151.86 : x
2. Step 2: Convert to fraction form
   8,081.76/12,117.27 = 3,151.86/x
3. Step 3: Cross multiply
   8,081.76x = 12,117.27 × 3,151.86
4. Step 4: Simplify right side
   8,081.76x = 38,191,938.62
5. Step 5: Solve for x
   x = 38,191,938.62/8,081.76
6. Step 6: Final answer
   x = 4,725.70