Finding the Fourth Proportional to 2,834.36, 4,250.72 and 985.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,834.36 : 4,250.72 = 985.40 : x
2. Step 2: Convert to fraction form
   2,834.36/4,250.72 = 985.40/x
3. Step 3: Cross multiply
   2,834.36x = 4,250.72 × 985.40
4. Step 4: Simplify right side
   2,834.36x = 4,188,659.49
5. Step 5: Solve for x
   x = 4,188,659.49/2,834.36
6. Step 6: Final answer
   x = 1,477.81