Finding the Fourth Proportional to 3,173.18, 4,759.59 and 864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,173.18 : 4,759.59 = 864.50 : x
2. Step 2: Convert to fraction form
   3,173.18/4,759.59 = 864.50/x
3. Step 3: Cross multiply
   3,173.18x = 4,759.59 × 864.50
4. Step 4: Simplify right side
   3,173.18x = 4,114,665.56
5. Step 5: Solve for x
   x = 4,114,665.56/3,173.18
6. Step 6: Final answer
   x = 1,296.70