Finding the Fourth Proportional to 1,160.57, 1,601.53 and 636.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.57 : 1,601.53 = 636.59 : x
2. Step 2: Convert to fraction form
   1,160.57/1,601.53 = 636.59/x
3. Step 3: Cross multiply
   1,160.57x = 1,601.53 × 636.59
4. Step 4: Simplify right side
   1,160.57x = 1,019,508.38
5. Step 5: Solve for x
   x = 1,019,508.38/1,160.57
6. Step 6: Final answer
   x = 878.46