Finding the Fourth Proportional to 1,196.98, 1,797.36 and 712.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.98 : 1,797.36 = 712.20 : x
2. Step 2: Convert to fraction form
   1,196.98/1,797.36 = 712.20/x
3. Step 3: Cross multiply
   1,196.98x = 1,797.36 × 712.20
4. Step 4: Simplify right side
   1,196.98x = 1,280,079.79
5. Step 5: Solve for x
   x = 1,280,079.79/1,196.98
6. Step 6: Final answer
   x = 1,069.42