Finding the Fourth Proportional to 1,356.79, 1,872.69 and 797.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.79 : 1,872.69 = 797.28 : x
2. Step 2: Convert to fraction form
   1,356.79/1,872.69 = 797.28/x
3. Step 3: Cross multiply
   1,356.79x = 1,872.69 × 797.28
4. Step 4: Simplify right side
   1,356.79x = 1,493,058.28
5. Step 5: Solve for x
   x = 1,493,058.28/1,356.79
6. Step 6: Final answer
   x = 1,100.44