Finding the Fourth Proportional to 1,164.62, 1,607.28 and 660.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.62 : 1,607.28 = 660.54 : x
2. Step 2: Convert to fraction form
   1,164.62/1,607.28 = 660.54/x
3. Step 3: Cross multiply
   1,164.62x = 1,607.28 × 660.54
4. Step 4: Simplify right side
   1,164.62x = 1,061,672.73
5. Step 5: Solve for x
   x = 1,061,672.73/1,164.62
6. Step 6: Final answer
   x = 911.60