Finding the Fourth Proportional to 3,680.02, 5,078.56 and 2,108.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.02 : 5,078.56 = 2,108.42 : x
2. Step 2: Convert to fraction form
   3,680.02/5,078.56 = 2,108.42/x
3. Step 3: Cross multiply
   3,680.02x = 5,078.56 × 2,108.42
4. Step 4: Simplify right side
   3,680.02x = 10,707,737.48
5. Step 5: Solve for x
   x = 10,707,737.48/3,680.02
6. Step 6: Final answer
   x = 2,909.70