Finding the Fourth Proportional to 3,927.17, 5,417.85 and 2,355.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,927.17 : 5,417.85 = 2,355.27 : x
2. Step 2: Convert to fraction form
   3,927.17/5,417.85 = 2,355.27/x
3. Step 3: Cross multiply
   3,927.17x = 5,417.85 × 2,355.27
4. Step 4: Simplify right side
   3,927.17x = 12,760,499.57
5. Step 5: Solve for x
   x = 12,760,499.57/3,927.17
6. Step 6: Final answer
   x = 3,249.29