Finding the Fourth Proportional to 3,679.96, 5,078.81 and 2,108.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,679.96 : 5,078.81 = 2,108.05 : x
2. Step 2: Convert to fraction form
   3,679.96/5,078.81 = 2,108.05/x
3. Step 3: Cross multiply
   3,679.96x = 5,078.81 × 2,108.05
4. Step 4: Simplify right side
   3,679.96x = 10,706,385.42
5. Step 5: Solve for x
   x = 10,706,385.42/3,679.96
6. Step 6: Final answer
   x = 2,909.38