Finding the Fourth Proportional to 2,428.78, 3,351.27 and 1,434.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.78 : 3,351.27 = 1,434.37 : x
2. Step 2: Convert to fraction form
   2,428.78/3,351.27 = 1,434.37/x
3. Step 3: Cross multiply
   2,428.78x = 3,351.27 × 1,434.37
4. Step 4: Simplify right side
   2,428.78x = 4,806,961.15
5. Step 5: Solve for x
   x = 4,806,961.15/2,428.78
6. Step 6: Final answer
   x = 1,979.17