Finding the Fourth Proportional to 3,132.10, 4,290.18 and 3,123.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,132.10 : 4,290.18 = 3,123.46 : x
2. Step 2: Convert to fraction form
   3,132.10/4,290.18 = 3,123.46/x
3. Step 3: Cross multiply
   3,132.10x = 4,290.18 × 3,123.46
4. Step 4: Simplify right side
   3,132.10x = 13,400,205.62
5. Step 5: Solve for x
   x = 13,400,205.62/3,132.10
6. Step 6: Final answer
   x = 4,278.35