Finding the Fourth Proportional to 2,662.34, 3,979.84 and 2,108.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.34 : 3,979.84 = 2,108.30 : x
2. Step 2: Convert to fraction form
   2,662.34/3,979.84 = 2,108.30/x
3. Step 3: Cross multiply
   2,662.34x = 3,979.84 × 2,108.30
4. Step 4: Simplify right side
   2,662.34x = 8,390,696.67
5. Step 5: Solve for x
   x = 8,390,696.67/2,662.34
6. Step 6: Final answer
   x = 3,151.62