Finding the Fourth Proportional to 1,134.01, 1,564.82 and 636.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.01 : 1,564.82 = 636.71 : x
2. Step 2: Convert to fraction form
   1,134.01/1,564.82 = 636.71/x
3. Step 3: Cross multiply
   1,134.01x = 1,564.82 × 636.71
4. Step 4: Simplify right side
   1,134.01x = 996,327.92
5. Step 5: Solve for x
   x = 996,327.92/1,134.01
6. Step 6: Final answer
   x = 878.59