Finding the Fourth Proportional to 1,160.30, 1,601.24 and 636.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.30 : 1,601.24 = 636.32 : x
2. Step 2: Convert to fraction form
   1,160.30/1,601.24 = 636.32/x
3. Step 3: Cross multiply
   1,160.30x = 1,601.24 × 636.32
4. Step 4: Simplify right side
   1,160.30x = 1,018,901.86
5. Step 5: Solve for x
   x = 1,018,901.86/1,160.30
6. Step 6: Final answer
   x = 878.13