Finding the Fourth Proportional to 3,401.98, 5,100.75 and 1,428.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.98 : 5,100.75 = 1,428.87 : x
2. Step 2: Convert to fraction form
   3,401.98/5,100.75 = 1,428.87/x
3. Step 3: Cross multiply
   3,401.98x = 5,100.75 × 1,428.87
4. Step 4: Simplify right side
   3,401.98x = 7,288,324.98
5. Step 5: Solve for x
   x = 7,288,324.98/3,401.98
6. Step 6: Final answer
   x = 2,142.38