Finding the Fourth Proportional to 2,402.13, 3,601.71 and 939.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.13 : 3,601.71 = 939.57 : x
2. Step 2: Convert to fraction form
   2,402.13/3,601.71 = 939.57/x
3. Step 3: Cross multiply
   2,402.13x = 3,601.71 × 939.57
4. Step 4: Simplify right side
   2,402.13x = 3,384,058.66
5. Step 5: Solve for x
   x = 3,384,058.66/2,402.13
6. Step 6: Final answer
   x = 1,408.77