Finding the Fourth Proportional to 1,385.34, 2,073.13 and 865.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.34 : 2,073.13 = 865.59 : x
2. Step 2: Convert to fraction form
   1,385.34/2,073.13 = 865.59/x
3. Step 3: Cross multiply
   1,385.34x = 2,073.13 × 865.59
4. Step 4: Simplify right side
   1,385.34x = 1,794,470.23
5. Step 5: Solve for x
   x = 1,794,470.23/1,385.34
6. Step 6: Final answer
   x = 1,295.33