Finding the Fourth Proportional to 1,096.46, 1,640.56 and 656.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.46 : 1,640.56 = 656.09 : x
2. Step 2: Convert to fraction form
   1,096.46/1,640.56 = 656.09/x
3. Step 3: Cross multiply
   1,096.46x = 1,640.56 × 656.09
4. Step 4: Simplify right side
   1,096.46x = 1,076,355.01
5. Step 5: Solve for x
   x = 1,076,355.01/1,096.46
6. Step 6: Final answer
   x = 981.66