Finding the Fourth Proportional to 8,074.86, 12,113.49 and 3,147.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,074.86 : 12,113.49 = 3,147.72 : x
2. Step 2: Convert to fraction form
   8,074.86/12,113.49 = 3,147.72/x
3. Step 3: Cross multiply
   8,074.86x = 12,113.49 × 3,147.72
4. Step 4: Simplify right side
   8,074.86x = 38,129,874.74
5. Step 5: Solve for x
   x = 38,129,874.74/8,074.86
6. Step 6: Final answer
   x = 4,722.05