Finding the Fourth Proportional to 8,155.91, 12,238.48 and 3,475.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.91 : 12,238.48 = 3,475.42 : x
2. Step 2: Convert to fraction form
   8,155.91/12,238.48 = 3,475.42/x
3. Step 3: Cross multiply
   8,155.91x = 12,238.48 × 3,475.42
4. Step 4: Simplify right side
   8,155.91x = 42,533,881.20
5. Step 5: Solve for x
   x = 42,533,881.20/8,155.91
6. Step 6: Final answer
   x = 5,215.10