Finding the Fourth Proportional to 2,738.05, 4,107.15 and 790.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.05 : 4,107.15 = 790.25 : x
2. Step 2: Convert to fraction form
   2,738.05/4,107.15 = 790.25/x
3. Step 3: Cross multiply
   2,738.05x = 4,107.15 × 790.25
4. Step 4: Simplify right side
   2,738.05x = 3,245,672.32
5. Step 5: Solve for x
   x = 3,245,672.32/2,738.05
6. Step 6: Final answer
   x = 1,185.40