Finding the Fourth Proportional to 2,287.81, 3,433.12 and 900.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.81 : 3,433.12 = 900.91 : x
2. Step 2: Convert to fraction form
   2,287.81/3,433.12 = 900.91/x
3. Step 3: Cross multiply
   2,287.81x = 3,433.12 × 900.91
4. Step 4: Simplify right side
   2,287.81x = 3,092,914.97
5. Step 5: Solve for x
   x = 3,092,914.97/2,287.81
6. Step 6: Final answer
   x = 1,351.91