Finding the Fourth Proportional to 2,098.78, 2,895.88 and 1,259.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.78 : 2,895.88 = 1,259.72 : x
2. Step 2: Convert to fraction form
   2,098.78/2,895.88 = 1,259.72/x
3. Step 3: Cross multiply
   2,098.78x = 2,895.88 × 1,259.72
4. Step 4: Simplify right side
   2,098.78x = 3,647,997.95
5. Step 5: Solve for x
   x = 3,647,997.95/2,098.78
6. Step 6: Final answer
   x = 1,738.15