Finding the Fourth Proportional to 1,096.57, 1,643.00 and 662.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.57 : 1,643.00 = 662.81 : x
2. Step 2: Convert to fraction form
   1,096.57/1,643.00 = 662.81/x
3. Step 3: Cross multiply
   1,096.57x = 1,643.00 × 662.81
4. Step 4: Simplify right side
   1,096.57x = 1,088,997.62
5. Step 5: Solve for x
   x = 1,088,997.62/1,096.57
6. Step 6: Final answer
   x = 993.10