Finding the Fourth Proportional to 2,937.42, 4,406.81 and 989.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,937.42 : 4,406.81 = 989.57 : x
2. Step 2: Convert to fraction form
   2,937.42/4,406.81 = 989.57/x
3. Step 3: Cross multiply
   2,937.42x = 4,406.81 × 989.57
4. Step 4: Simplify right side
   2,937.42x = 4,360,853.04
5. Step 5: Solve for x
   x = 4,360,853.04/2,937.42
6. Step 6: Final answer
   x = 1,484.59