Finding the Fourth Proportional to 3,872.90, 5,799.98 and 3,679.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.90 : 5,799.98 = 3,679.11 : x
2. Step 2: Convert to fraction form
   3,872.90/5,799.98 = 3,679.11/x
3. Step 3: Cross multiply
   3,872.90x = 5,799.98 × 3,679.11
4. Step 4: Simplify right side
   3,872.90x = 21,338,764.42
5. Step 5: Solve for x
   x = 21,338,764.42/3,872.90
6. Step 6: Final answer
   x = 5,509.76