Finding the Fourth Proportional to 2,089.90, 2,884.05 and 1,145.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.90 : 2,884.05 = 1,145.69 : x
2. Step 2: Convert to fraction form
   2,089.90/2,884.05 = 1,145.69/x
3. Step 3: Cross multiply
   2,089.90x = 2,884.05 × 1,145.69
4. Step 4: Simplify right side
   2,089.90x = 3,304,227.24
5. Step 5: Solve for x
   x = 3,304,227.24/2,089.90
6. Step 6: Final answer
   x = 1,581.05