Finding the Fourth Proportional to 1,173.48, 1,761.50 and 864.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.48 : 1,761.50 = 864.37 : x
2. Step 2: Convert to fraction form
   1,173.48/1,761.50 = 864.37/x
3. Step 3: Cross multiply
   1,173.48x = 1,761.50 × 864.37
4. Step 4: Simplify right side
   1,173.48x = 1,522,587.76
5. Step 5: Solve for x
   x = 1,522,587.76/1,173.48
6. Step 6: Final answer
   x = 1,297.50