Finding the Fourth Proportional to 1,098.92, 1,647.31 and 636.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.92 : 1,647.31 = 636.27 : x
2. Step 2: Convert to fraction form
   1,098.92/1,647.31 = 636.27/x
3. Step 3: Cross multiply
   1,098.92x = 1,647.31 × 636.27
4. Step 4: Simplify right side
   1,098.92x = 1,048,133.93
5. Step 5: Solve for x
   x = 1,048,133.93/1,098.92
6. Step 6: Final answer
   x = 953.79