Finding the Fourth Proportional to 1,259.78, 1,738.49 and 700.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.78 : 1,738.49 = 700.28 : x
2. Step 2: Convert to fraction form
   1,259.78/1,738.49 = 700.28/x
3. Step 3: Cross multiply
   1,259.78x = 1,738.49 × 700.28
4. Step 4: Simplify right side
   1,259.78x = 1,217,429.78
5. Step 5: Solve for x
   x = 1,217,429.78/1,259.78
6. Step 6: Final answer
   x = 966.39