Finding the Fourth Proportional to 1,198.07, 1,796.81 and 612.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198.07 : 1,796.81 = 612.74 : x
2. Step 2: Convert to fraction form
   1,198.07/1,796.81 = 612.74/x
3. Step 3: Cross multiply
   1,198.07x = 1,796.81 × 612.74
4. Step 4: Simplify right side
   1,198.07x = 1,100,978.79
5. Step 5: Solve for x
   x = 1,100,978.79/1,198.07
6. Step 6: Final answer
   x = 918.96