Finding the Fourth Proportional to 3,716.17, 5,128.17 and 2,223.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,716.17 : 5,128.17 = 2,223.31 : x
2. Step 2: Convert to fraction form
   3,716.17/5,128.17 = 2,223.31/x
3. Step 3: Cross multiply
   3,716.17x = 5,128.17 × 2,223.31
4. Step 4: Simplify right side
   3,716.17x = 11,401,511.64
5. Step 5: Solve for x
   x = 11,401,511.64/3,716.17
6. Step 6: Final answer
   x = 3,068.08