Finding the Fourth Proportional to 2,611.74, 3,916.83 and 1,378.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.74 : 3,916.83 = 1,378.49 : x
2. Step 2: Convert to fraction form
   2,611.74/3,916.83 = 1,378.49/x
3. Step 3: Cross multiply
   2,611.74x = 3,916.83 × 1,378.49
4. Step 4: Simplify right side
   2,611.74x = 5,399,291.40
5. Step 5: Solve for x
   x = 5,399,291.40/2,611.74
6. Step 6: Final answer
   x = 2,067.32