Finding the Fourth Proportional to 2,614.94, 3,915.39 and 1,379.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,614.94 : 3,915.39 = 1,379.78 : x
2. Step 2: Convert to fraction form
   2,614.94/3,915.39 = 1,379.78/x
3. Step 3: Cross multiply
   2,614.94x = 3,915.39 × 1,379.78
4. Step 4: Simplify right side
   2,614.94x = 5,402,376.81
5. Step 5: Solve for x
   x = 5,402,376.81/2,614.94
6. Step 6: Final answer
   x = 2,065.97