Finding the Fourth Proportional to 1,654.05, 2,282.42 and 990.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,654.05 : 2,282.42 = 990.89 : x
2. Step 2: Convert to fraction form
   1,654.05/2,282.42 = 990.89/x
3. Step 3: Cross multiply
   1,654.05x = 2,282.42 × 990.89
4. Step 4: Simplify right side
   1,654.05x = 2,261,628.64
5. Step 5: Solve for x
   x = 2,261,628.64/1,654.05
6. Step 6: Final answer
   x = 1,367.32