Finding the Fourth Proportional to 1,298.24, 1,790.56 and 774.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.24 : 1,790.56 = 774.16 : x
2. Step 2: Convert to fraction form
   1,298.24/1,790.56 = 774.16/x
3. Step 3: Cross multiply
   1,298.24x = 1,790.56 × 774.16
4. Step 4: Simplify right side
   1,298.24x = 1,386,179.93
5. Step 5: Solve for x
   x = 1,386,179.93/1,298.24
6. Step 6: Final answer
   x = 1,067.74