Finding the Fourth Proportional to 2,989.77, 4,484.89 and 909.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.77 : 4,484.89 = 909.96 : x
2. Step 2: Convert to fraction form
   2,989.77/4,484.89 = 909.96/x
3. Step 3: Cross multiply
   2,989.77x = 4,484.89 × 909.96
4. Step 4: Simplify right side
   2,989.77x = 4,081,053.54
5. Step 5: Solve for x
   x = 4,081,053.54/2,989.77
6. Step 6: Final answer
   x = 1,365.00