Finding the Fourth Proportional to 2,287.45, 3,428.82 and 900.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.45 : 3,428.82 = 900.23 : x
2. Step 2: Convert to fraction form
   2,287.45/3,428.82 = 900.23/x
3. Step 3: Cross multiply
   2,287.45x = 3,428.82 × 900.23
4. Step 4: Simplify right side
   2,287.45x = 3,086,709.48
5. Step 5: Solve for x
   x = 3,086,709.48/2,287.45
6. Step 6: Final answer
   x = 1,349.41