Finding the Fourth Proportional to 1,134.32, 1,565.33 and 636.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.32 : 1,565.33 = 636.98 : x
2. Step 2: Convert to fraction form
   1,134.32/1,565.33 = 636.98/x
3. Step 3: Cross multiply
   1,134.32x = 1,565.33 × 636.98
4. Step 4: Simplify right side
   1,134.32x = 997,090.09
5. Step 5: Solve for x
   x = 997,090.09/1,134.32
6. Step 6: Final answer
   x = 879.02