Finding the Fourth Proportional to 2,072.79, 3,104.39 and 1,249.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.79 : 3,104.39 = 1,249.25 : x
2. Step 2: Convert to fraction form
   2,072.79/3,104.39 = 1,249.25/x
3. Step 3: Cross multiply
   2,072.79x = 3,104.39 × 1,249.25
4. Step 4: Simplify right side
   2,072.79x = 3,878,159.21
5. Step 5: Solve for x
   x = 3,878,159.21/2,072.79
6. Step 6: Final answer
   x = 1,870.99