Finding the Fourth Proportional to 2,402.16, 3,601.86 and 939.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.16 : 3,601.86 = 939.64 : x
2. Step 2: Convert to fraction form
   2,402.16/3,601.86 = 939.64/x
3. Step 3: Cross multiply
   2,402.16x = 3,601.86 × 939.64
4. Step 4: Simplify right side
   2,402.16x = 3,384,451.73
5. Step 5: Solve for x
   x = 3,384,451.73/2,402.16
6. Step 6: Final answer
   x = 1,408.92