Finding the Fourth Proportional to 2,618.74, 3,926.46 and 1,385.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.74 : 3,926.46 = 1,385.38 : x
2. Step 2: Convert to fraction form
   2,618.74/3,926.46 = 1,385.38/x
3. Step 3: Cross multiply
   2,618.74x = 3,926.46 × 1,385.38
4. Step 4: Simplify right side
   2,618.74x = 5,439,639.15
5. Step 5: Solve for x
   x = 5,439,639.15/2,618.74
6. Step 6: Final answer
   x = 2,077.20