Finding the Fourth Proportional to 1,096.56, 1,641.42 and 608.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.56 : 1,641.42 = 608.40 : x
2. Step 2: Convert to fraction form
   1,096.56/1,641.42 = 608.40/x
3. Step 3: Cross multiply
   1,096.56x = 1,641.42 × 608.40
4. Step 4: Simplify right side
   1,096.56x = 998,639.93
5. Step 5: Solve for x
   x = 998,639.93/1,096.56
6. Step 6: Final answer
   x = 910.70