Finding the Fourth Proportional to 8,078.86, 12,113.74 and 3,142.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,078.86 : 12,113.74 = 3,142.86 : x
2. Step 2: Convert to fraction form
   8,078.86/12,113.74 = 3,142.86/x
3. Step 3: Cross multiply
   8,078.86x = 12,113.74 × 3,142.86
4. Step 4: Simplify right side
   8,078.86x = 38,071,788.90
5. Step 5: Solve for x
   x = 38,071,788.90/8,078.86
6. Step 6: Final answer
   x = 4,712.52