Finding the Fourth Proportional to 1,424.60, 1,965.38 and 864.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.60 : 1,965.38 = 864.86 : x
2. Step 2: Convert to fraction form
   1,424.60/1,965.38 = 864.86/x
3. Step 3: Cross multiply
   1,424.60x = 1,965.38 × 864.86
4. Step 4: Simplify right side
   1,424.60x = 1,699,764.40
5. Step 5: Solve for x
   x = 1,699,764.40/1,424.60
6. Step 6: Final answer
   x = 1,193.16