Finding the Fourth Proportional to 2,758.98, 4,139.16 and 910.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.98 : 4,139.16 = 910.20 : x
2. Step 2: Convert to fraction form
   2,758.98/4,139.16 = 910.20/x
3. Step 3: Cross multiply
   2,758.98x = 4,139.16 × 910.20
4. Step 4: Simplify right side
   2,758.98x = 3,767,463.43
5. Step 5: Solve for x
   x = 3,767,463.43/2,758.98
6. Step 6: Final answer
   x = 1,365.53