Finding the Fourth Proportional to 3,400.78, 5,100.96 and 1,028.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,400.78 : 5,100.96 = 1,028.81 : x
2. Step 2: Convert to fraction form
   3,400.78/5,100.96 = 1,028.81/x
3. Step 3: Cross multiply
   3,400.78x = 5,100.96 × 1,028.81
4. Step 4: Simplify right side
   3,400.78x = 5,247,918.66
5. Step 5: Solve for x
   x = 5,247,918.66/3,400.78
6. Step 6: Final answer
   x = 1,543.15