Finding the Fourth Proportional to 8,156.78, 12,233.10 and 3,474.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.78 : 12,233.10 = 3,474.20 : x
2. Step 2: Convert to fraction form
   8,156.78/12,233.10 = 3,474.20/x
3. Step 3: Cross multiply
   8,156.78x = 12,233.10 × 3,474.20
4. Step 4: Simplify right side
   8,156.78x = 42,500,236.02
5. Step 5: Solve for x
   x = 42,500,236.02/8,156.78
6. Step 6: Final answer
   x = 5,210.42