Finding the Fourth Proportional to 2,629.65, 3,942.18 and 985.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.65 : 3,942.18 = 985.76 : x
2. Step 2: Convert to fraction form
   2,629.65/3,942.18 = 985.76/x
3. Step 3: Cross multiply
   2,629.65x = 3,942.18 × 985.76
4. Step 4: Simplify right side
   2,629.65x = 3,886,023.65
5. Step 5: Solve for x
   x = 3,886,023.65/2,629.65
6. Step 6: Final answer
   x = 1,477.77