Finding the Fourth Proportional to 2,144.86, 3,216.90 and 759.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.86 : 3,216.90 = 759.22 : x
2. Step 2: Convert to fraction form
   2,144.86/3,216.90 = 759.22/x
3. Step 3: Cross multiply
   2,144.86x = 3,216.90 × 759.22
4. Step 4: Simplify right side
   2,144.86x = 2,442,334.82
5. Step 5: Solve for x
   x = 2,442,334.82/2,144.86
6. Step 6: Final answer
   x = 1,138.69