Finding the Fourth Proportional to 3,181.72, 4,388.40 and 3,042.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,181.72 : 4,388.40 = 3,042.12 : x
2. Step 2: Convert to fraction form
   3,181.72/4,388.40 = 3,042.12/x
3. Step 3: Cross multiply
   3,181.72x = 4,388.40 × 3,042.12
4. Step 4: Simplify right side
   3,181.72x = 13,350,039.41
5. Step 5: Solve for x
   x = 13,350,039.41/3,181.72
6. Step 6: Final answer
   x = 4,195.86