Finding the Fourth Proportional to 2,744.42, 4,117.64 and 989.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,744.42 : 4,117.64 = 989.55 : x
2. Step 2: Convert to fraction form
   2,744.42/4,117.64 = 989.55/x
3. Step 3: Cross multiply
   2,744.42x = 4,117.64 × 989.55
4. Step 4: Simplify right side
   2,744.42x = 4,074,605.71
5. Step 5: Solve for x
   x = 4,074,605.71/2,744.42
6. Step 6: Final answer
   x = 1,484.69