Finding the Fourth Proportional to 2,931.39, 4,396.96 and 851.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.39 : 4,396.96 = 851.35 : x
2. Step 2: Convert to fraction form
   2,931.39/4,396.96 = 851.35/x
3. Step 3: Cross multiply
   2,931.39x = 4,396.96 × 851.35
4. Step 4: Simplify right side
   2,931.39x = 3,743,351.90
5. Step 5: Solve for x
   x = 3,743,351.90/2,931.39
6. Step 6: Final answer
   x = 1,276.99