Finding the Fourth Proportional to 2,245.78, 3,098.81 and 1,251.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,245.78 : 3,098.81 = 1,251.05 : x
2. Step 2: Convert to fraction form
   2,245.78/3,098.81 = 1,251.05/x
3. Step 3: Cross multiply
   2,245.78x = 3,098.81 × 1,251.05
4. Step 4: Simplify right side
   2,245.78x = 3,876,777.13
5. Step 5: Solve for x
   x = 3,876,777.13/2,245.78
6. Step 6: Final answer
   x = 1,726.25