Finding the Fourth Proportional to 1,160.73, 1,601.82 and 636.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.73 : 1,601.82 = 636.75 : x
2. Step 2: Convert to fraction form
   1,160.73/1,601.82 = 636.75/x
3. Step 3: Cross multiply
   1,160.73x = 1,601.82 × 636.75
4. Step 4: Simplify right side
   1,160.73x = 1,019,958.89
5. Step 5: Solve for x
   x = 1,019,958.89/1,160.73
6. Step 6: Final answer
   x = 878.72