Finding the Fourth Proportional to 2,428.72, 3,350.85 and 1,434.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.72 : 3,350.85 = 1,434.34 : x
2. Step 2: Convert to fraction form
   2,428.72/3,350.85 = 1,434.34/x
3. Step 3: Cross multiply
   2,428.72x = 3,350.85 × 1,434.34
4. Step 4: Simplify right side
   2,428.72x = 4,806,258.19
5. Step 5: Solve for x
   x = 4,806,258.19/2,428.72
6. Step 6: Final answer
   x = 1,978.93