Finding the Fourth Proportional to 3,452.76, 5,142.78 and 3,380.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,452.76 : 5,142.78 = 3,380.76 : x
2. Step 2: Convert to fraction form
   3,452.76/5,142.78 = 3,380.76/x
3. Step 3: Cross multiply
   3,452.76x = 5,142.78 × 3,380.76
4. Step 4: Simplify right side
   3,452.76x = 17,386,504.91
5. Step 5: Solve for x
   x = 17,386,504.91/3,452.76
6. Step 6: Final answer
   x = 5,035.54