Finding the Fourth Proportional to 2,678.41, 4,018.83 and 1,380.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.41 : 4,018.83 = 1,380.79 : x
2. Step 2: Convert to fraction form
   2,678.41/4,018.83 = 1,380.79/x
3. Step 3: Cross multiply
   2,678.41x = 4,018.83 × 1,380.79
4. Step 4: Simplify right side
   2,678.41x = 5,549,160.28
5. Step 5: Solve for x
   x = 5,549,160.28/2,678.41
6. Step 6: Final answer
   x = 2,071.81