Finding the Fourth Proportional to 3,653.78, 5,042.22 and 1,997.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,653.78 : 5,042.22 = 1,997.78 : x
2. Step 2: Convert to fraction form
   3,653.78/5,042.22 = 1,997.78/x
3. Step 3: Cross multiply
   3,653.78x = 5,042.22 × 1,997.78
4. Step 4: Simplify right side
   3,653.78x = 10,073,246.27
5. Step 5: Solve for x
   x = 10,073,246.27/3,653.78
6. Step 6: Final answer
   x = 2,756.94