Finding the Fourth Proportional to 2,545.78, 3,513.21 and 1,426.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,545.78 : 3,513.21 = 1,426.96 : x
2. Step 2: Convert to fraction form
   2,545.78/3,513.21 = 1,426.96/x
3. Step 3: Cross multiply
   2,545.78x = 3,513.21 × 1,426.96
4. Step 4: Simplify right side
   2,545.78x = 5,013,228.67
5. Step 5: Solve for x
   x = 5,013,228.67/2,545.78
6. Step 6: Final answer
   x = 1,969.23