Finding the Fourth Proportional to 1,098.55, 1,647.89 and 662.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.55 : 1,647.89 = 662.77 : x
2. Step 2: Convert to fraction form
   1,098.55/1,647.89 = 662.77/x
3. Step 3: Cross multiply
   1,098.55x = 1,647.89 × 662.77
4. Step 4: Simplify right side
   1,098.55x = 1,092,172.06
5. Step 5: Solve for x
   x = 1,092,172.06/1,098.55
6. Step 6: Final answer
   x = 994.19