Finding the Fourth Proportional to 1,108.27, 1,529.52 and 636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.27 : 1,529.52 = 636.25 : x
2. Step 2: Convert to fraction form
   1,108.27/1,529.52 = 636.25/x
3. Step 3: Cross multiply
   1,108.27x = 1,529.52 × 636.25
4. Step 4: Simplify right side
   1,108.27x = 973,157.10
5. Step 5: Solve for x
   x = 973,157.10/1,108.27
6. Step 6: Final answer
   x = 878.09