Finding the Fourth Proportional to 2,286.42, 3,431.45 and 900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.42 : 3,431.45 = 900.10 : x
2. Step 2: Convert to fraction form
   2,286.42/3,431.45 = 900.10/x
3. Step 3: Cross multiply
   2,286.42x = 3,431.45 × 900.10
4. Step 4: Simplify right side
   2,286.42x = 3,088,648.15
5. Step 5: Solve for x
   x = 3,088,648.15/2,286.42
6. Step 6: Final answer
   x = 1,350.87