Finding the Fourth Proportional to 2,039.78, 3,057.93 and 1,259.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.78 : 3,057.93 = 1,259.75 : x
2. Step 2: Convert to fraction form
   2,039.78/3,057.93 = 1,259.75/x
3. Step 3: Cross multiply
   2,039.78x = 3,057.93 × 1,259.75
4. Step 4: Simplify right side
   2,039.78x = 3,852,227.32
5. Step 5: Solve for x
   x = 3,852,227.32/2,039.78
6. Step 6: Final answer
   x = 1,888.55