Finding the Fourth Proportional to 2,758.93, 4,138.52 and 910.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.93 : 4,138.52 = 910.21 : x
2. Step 2: Convert to fraction form
   2,758.93/4,138.52 = 910.21/x
3. Step 3: Cross multiply
   2,758.93x = 4,138.52 × 910.21
4. Step 4: Simplify right side
   2,758.93x = 3,766,915.93
5. Step 5: Solve for x
   x = 3,766,915.93/2,758.93
6. Step 6: Final answer
   x = 1,365.35