Finding the Fourth Proportional to 2,431.16, 3,350.72 and 2,112.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.16 : 3,350.72 = 2,112.85 : x
2. Step 2: Convert to fraction form
   2,431.16/3,350.72 = 2,112.85/x
3. Step 3: Cross multiply
   2,431.16x = 3,350.72 × 2,112.85
4. Step 4: Simplify right side
   2,431.16x = 7,079,565.57
5. Step 5: Solve for x
   x = 7,079,565.57/2,431.16
6. Step 6: Final answer
   x = 2,912.01