Finding the Fourth Proportional to 2,208.51, 3,314.27 and 1,428.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,208.51 : 3,314.27 = 1,428.86 : x
2. Step 2: Convert to fraction form
   2,208.51/3,314.27 = 1,428.86/x
3. Step 3: Cross multiply
   2,208.51x = 3,314.27 × 1,428.86
4. Step 4: Simplify right side
   2,208.51x = 4,735,639.69
5. Step 5: Solve for x
   x = 4,735,639.69/2,208.51
6. Step 6: Final answer
   x = 2,144.27