Finding the Fourth Proportional to 2,538.28, 3,502.78 and 1,434.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.28 : 3,502.78 = 1,434.28 : x
2. Step 2: Convert to fraction form
   2,538.28/3,502.78 = 1,434.28/x
3. Step 3: Cross multiply
   2,538.28x = 3,502.78 × 1,434.28
4. Step 4: Simplify right side
   2,538.28x = 5,023,967.30
5. Step 5: Solve for x
   x = 5,023,967.30/2,538.28
6. Step 6: Final answer
   x = 1,979.28