Finding the Fourth Proportional to 8,078.66, 12,113.03 and 3,142.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,078.66 : 12,113.03 = 3,142.55 : x
2. Step 2: Convert to fraction form
   8,078.66/12,113.03 = 3,142.55/x
3. Step 3: Cross multiply
   8,078.66x = 12,113.03 × 3,142.55
4. Step 4: Simplify right side
   8,078.66x = 38,065,840.57
5. Step 5: Solve for x
   x = 38,065,840.57/8,078.66
6. Step 6: Final answer
   x = 4,711.90