Finding the Fourth Proportional to 2,155.71, 3,233.53 and 1,425.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.71 : 3,233.53 = 1,425.12 : x
2. Step 2: Convert to fraction form
   2,155.71/3,233.53 = 1,425.12/x
3. Step 3: Cross multiply
   2,155.71x = 3,233.53 × 1,425.12
4. Step 4: Simplify right side
   2,155.71x = 4,608,168.27
5. Step 5: Solve for x
   x = 4,608,168.27/2,155.71
6. Step 6: Final answer
   x = 2,137.66