Finding the Fourth Proportional to 3,680.78, 5,508.81 and 3,377.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.78 : 5,508.81 = 3,377.30 : x
2. Step 2: Convert to fraction form
   3,680.78/5,508.81 = 3,377.30/x
3. Step 3: Cross multiply
   3,680.78x = 5,508.81 × 3,377.30
4. Step 4: Simplify right side
   3,680.78x = 18,604,876.47
5. Step 5: Solve for x
   x = 18,604,876.47/3,680.78
6. Step 6: Final answer
   x = 5,054.61