Finding the Fourth Proportional to 1,424.91, 1,966.55 and 865.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.91 : 1,966.55 = 865.59 : x
2. Step 2: Convert to fraction form
   1,424.91/1,966.55 = 865.59/x
3. Step 3: Cross multiply
   1,424.91x = 1,966.55 × 865.59
4. Step 4: Simplify right side
   1,424.91x = 1,702,221.69
5. Step 5: Solve for x
   x = 1,702,221.69/1,424.91
6. Step 6: Final answer
   x = 1,194.62