Finding the Fourth Proportional to 1,424.88, 1,965.48 and 864.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.88 : 1,965.48 = 864.96 : x
2. Step 2: Convert to fraction form
   1,424.88/1,965.48 = 864.96/x
3. Step 3: Cross multiply
   1,424.88x = 1,965.48 × 864.96
4. Step 4: Simplify right side
   1,424.88x = 1,700,061.58
5. Step 5: Solve for x
   x = 1,700,061.58/1,424.88
6. Step 6: Final answer
   x = 1,193.13