Finding the Fourth Proportional to 2,287.91, 3,430.82 and 900.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.91 : 3,430.82 = 900.18 : x
2. Step 2: Convert to fraction form
   2,287.91/3,430.82 = 900.18/x
3. Step 3: Cross multiply
   2,287.91x = 3,430.82 × 900.18
4. Step 4: Simplify right side
   2,287.91x = 3,088,357.80
5. Step 5: Solve for x
   x = 3,088,357.80/2,287.91
6. Step 6: Final answer
   x = 1,349.86