Finding the Fourth Proportional to 2,631.03, 3,943.20 and 985.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.03 : 3,943.20 = 985.62 : x
2. Step 2: Convert to fraction form
   2,631.03/3,943.20 = 985.62/x
3. Step 3: Cross multiply
   2,631.03x = 3,943.20 × 985.62
4. Step 4: Simplify right side
   2,631.03x = 3,886,496.78
5. Step 5: Solve for x
   x = 3,886,496.78/2,631.03
6. Step 6: Final answer
   x = 1,477.18