Finding the Fourth Proportional to 2,211.27, 3,314.94 and 1,431.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.27 : 3,314.94 = 1,431.87 : x
2. Step 2: Convert to fraction form
   2,211.27/3,314.94 = 1,431.87/x
3. Step 3: Cross multiply
   2,211.27x = 3,314.94 × 1,431.87
4. Step 4: Simplify right side
   2,211.27x = 4,746,546.56
5. Step 5: Solve for x
   x = 4,746,546.56/2,211.27
6. Step 6: Final answer
   x = 2,146.53