Finding the Fourth Proportional to 6,744.78, 10,112.31 and 4,142.25

Step by Step Solution

1. Step 1: Write the proportion equation
   6,744.78 : 10,112.31 = 4,142.25 : x
2. Step 2: Convert to fraction form
   6,744.78/10,112.31 = 4,142.25/x
3. Step 3: Cross multiply
   6,744.78x = 10,112.31 × 4,142.25
4. Step 4: Simplify right side
   6,744.78x = 41,887,716.10
5. Step 5: Solve for x
   x = 41,887,716.10/6,744.78
6. Step 6: Final answer
   x = 6,210.39