Finding the Fourth Proportional to 1,356.84, 1,872.45 and 797.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.84 : 1,872.45 = 797.31 : x
2. Step 2: Convert to fraction form
   1,356.84/1,872.45 = 797.31/x
3. Step 3: Cross multiply
   1,356.84x = 1,872.45 × 797.31
4. Step 4: Simplify right side
   1,356.84x = 1,492,923.11
5. Step 5: Solve for x
   x = 1,492,923.11/1,356.84
6. Step 6: Final answer
   x = 1,100.29