Finding the Fourth Proportional to 2,989.82, 4,484.89 and 909.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.82 : 4,484.89 = 909.89 : x
2. Step 2: Convert to fraction form
   2,989.82/4,484.89 = 909.89/x
3. Step 3: Cross multiply
   2,989.82x = 4,484.89 × 909.89
4. Step 4: Simplify right side
   2,989.82x = 4,080,756.56
5. Step 5: Solve for x
   x = 4,080,756.56/2,989.82
6. Step 6: Final answer
   x = 1,364.88