Finding the Fourth Proportional to 2,222.05, 3,330.77 and 990.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.05 : 3,330.77 = 990.04 : x
2. Step 2: Convert to fraction form
   2,222.05/3,330.77 = 990.04/x
3. Step 3: Cross multiply
   2,222.05x = 3,330.77 × 990.04
4. Step 4: Simplify right side
   2,222.05x = 3,297,595.53
5. Step 5: Solve for x
   x = 3,297,595.53/2,222.05
6. Step 6: Final answer
   x = 1,484.03