Finding the Fourth Proportional to 3,680.59, 5,079.21 and 2,108.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.59 : 5,079.21 = 2,108.69 : x
2. Step 2: Convert to fraction form
   3,680.59/5,079.21 = 2,108.69/x
3. Step 3: Cross multiply
   3,680.59x = 5,079.21 × 2,108.69
4. Step 4: Simplify right side
   3,680.59x = 10,710,479.33
5. Step 5: Solve for x
   x = 10,710,479.33/3,680.59
6. Step 6: Final answer
   x = 2,909.99