Finding the Fourth Proportional to 1,160.38, 1,601.32 and 636.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.38 : 1,601.32 = 636.41 : x
2. Step 2: Convert to fraction form
   1,160.38/1,601.32 = 636.41/x
3. Step 3: Cross multiply
   1,160.38x = 1,601.32 × 636.41
4. Step 4: Simplify right side
   1,160.38x = 1,019,090.47
5. Step 5: Solve for x
   x = 1,019,090.47/1,160.38
6. Step 6: Final answer
   x = 878.24