Finding the Fourth Proportional to 2,612.78, 3,919.73 and 1,297.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.78 : 3,919.73 = 1,297.25 : x
2. Step 2: Convert to fraction form
   2,612.78/3,919.73 = 1,297.25/x
3. Step 3: Cross multiply
   2,612.78x = 3,919.73 × 1,297.25
4. Step 4: Simplify right side
   2,612.78x = 5,084,843.66
5. Step 5: Solve for x
   x = 5,084,843.66/2,612.78
6. Step 6: Final answer
   x = 1,946.15