Finding the Fourth Proportional to 1,423.97, 1,965.25 and 864.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.97 : 1,965.25 = 864.58 : x
2. Step 2: Convert to fraction form
   1,423.97/1,965.25 = 864.58/x
3. Step 3: Cross multiply
   1,423.97x = 1,965.25 × 864.58
4. Step 4: Simplify right side
   1,423.97x = 1,699,118.60
5. Step 5: Solve for x
   x = 1,699,118.60/1,423.97
6. Step 6: Final answer
   x = 1,193.23