Finding the Fourth Proportional to 2,945.38, 4,417.93 and 865.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945.38 : 4,417.93 = 865.30 : x
2. Step 2: Convert to fraction form
   2,945.38/4,417.93 = 865.30/x
3. Step 3: Cross multiply
   2,945.38x = 4,417.93 × 865.30
4. Step 4: Simplify right side
   2,945.38x = 3,822,834.83
5. Step 5: Solve for x
   x = 3,822,834.83/2,945.38
6. Step 6: Final answer
   x = 1,297.91