Finding the Fourth Proportional to 3,557.34, 4,909.50 and 2,231.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.34 : 4,909.50 = 2,231.10 : x
2. Step 2: Convert to fraction form
   3,557.34/4,909.50 = 2,231.10/x
3. Step 3: Cross multiply
   3,557.34x = 4,909.50 × 2,231.10
4. Step 4: Simplify right side
   3,557.34x = 10,953,585.45
5. Step 5: Solve for x
   x = 10,953,585.45/3,557.34
6. Step 6: Final answer
   x = 3,079.15