Finding the Fourth Proportional to 1,160.29, 1,601.25 and 636.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.29 : 1,601.25 = 636.31 : x
2. Step 2: Convert to fraction form
   1,160.29/1,601.25 = 636.31/x
3. Step 3: Cross multiply
   1,160.29x = 1,601.25 × 636.31
4. Step 4: Simplify right side
   1,160.29x = 1,018,888.21
5. Step 5: Solve for x
   x = 1,018,888.21/1,160.29
6. Step 6: Final answer
   x = 878.13