Finding the Fourth Proportional to 3,680.04, 5,078.72 and 2,108.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.04 : 5,078.72 = 2,108.20 : x
2. Step 2: Convert to fraction form
   3,680.04/5,078.72 = 2,108.20/x
3. Step 3: Cross multiply
   3,680.04x = 5,078.72 × 2,108.20
4. Step 4: Simplify right side
   3,680.04x = 10,706,957.50
5. Step 5: Solve for x
   x = 10,706,957.50/3,680.04
6. Step 6: Final answer
   x = 2,909.47