Finding the Fourth Proportional to 3,123.80, 4,308.74 and 2,271.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.80 : 4,308.74 = 2,271.62 : x
2. Step 2: Convert to fraction form
   3,123.80/4,308.74 = 2,271.62/x
3. Step 3: Cross multiply
   3,123.80x = 4,308.74 × 2,271.62
4. Step 4: Simplify right side
   3,123.80x = 9,787,819.96
5. Step 5: Solve for x
   x = 9,787,819.96/3,123.80
6. Step 6: Final answer
   x = 3,133.31