Finding the Fourth Proportional to 3,936.86, 5,433.42 and 2,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.86 : 5,433.42 = 2,258.78 : x
2. Step 2: Convert to fraction form
   3,936.86/5,433.42 = 2,258.78/x
3. Step 3: Cross multiply
   3,936.86x = 5,433.42 × 2,258.78
4. Step 4: Simplify right side
   3,936.86x = 12,272,900.43
5. Step 5: Solve for x
   x = 12,272,900.43/3,936.86
6. Step 6: Final answer
   x = 3,117.43