Finding the Fourth Proportional to 1,134.18, 1,565.15 and 636.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.18 : 1,565.15 = 636.82 : x
2. Step 2: Convert to fraction form
   1,134.18/1,565.15 = 636.82/x
3. Step 3: Cross multiply
   1,134.18x = 1,565.15 × 636.82
4. Step 4: Simplify right side
   1,134.18x = 996,718.82
5. Step 5: Solve for x
   x = 996,718.82/1,134.18
6. Step 6: Final answer
   x = 878.80