Finding the Fourth Proportional to 2,628.59, 3,943.57 and 985.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.59 : 3,943.57 = 985.26 : x
2. Step 2: Convert to fraction form
   2,628.59/3,943.57 = 985.26/x
3. Step 3: Cross multiply
   2,628.59x = 3,943.57 × 985.26
4. Step 4: Simplify right side
   2,628.59x = 3,885,441.78
5. Step 5: Solve for x
   x = 3,885,441.78/2,628.59
6. Step 6: Final answer
   x = 1,478.15