Finding the Fourth Proportional to 1,422.39, 1,960.77 and 1,001.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.39 : 1,960.77 = 1,001.37 : x
2. Step 2: Convert to fraction form
   1,422.39/1,960.77 = 1,001.37/x
3. Step 3: Cross multiply
   1,422.39x = 1,960.77 × 1,001.37
4. Step 4: Simplify right side
   1,422.39x = 1,963,456.25
5. Step 5: Solve for x
   x = 1,963,456.25/1,422.39
6. Step 6: Final answer
   x = 1,380.39