Finding the Fourth Proportional to 2,218.67, 3,328.31 and 1,757.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.67 : 3,328.31 = 1,757.31 : x
2. Step 2: Convert to fraction form
   2,218.67/3,328.31 = 1,757.31/x
3. Step 3: Cross multiply
   2,218.67x = 3,328.31 × 1,757.31
4. Step 4: Simplify right side
   2,218.67x = 5,848,872.45
5. Step 5: Solve for x
   x = 5,848,872.45/2,218.67
6. Step 6: Final answer
   x = 2,636.21