Finding the Fourth Proportional to 8,111.02, 12,161.66 and 3,174.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.02 : 12,161.66 = 3,174.78 : x
2. Step 2: Convert to fraction form
   8,111.02/12,161.66 = 3,174.78/x
3. Step 3: Cross multiply
   8,111.02x = 12,161.66 × 3,174.78
4. Step 4: Simplify right side
   8,111.02x = 38,610,594.93
5. Step 5: Solve for x
   x = 38,610,594.93/8,111.02
6. Step 6: Final answer
   x = 4,760.26