Finding the Fourth Proportional to 2,757.78, 4,131.24 and 1,715.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,757.78 : 4,131.24 = 1,715.34 : x
2. Step 2: Convert to fraction form
   2,757.78/4,131.24 = 1,715.34/x
3. Step 3: Cross multiply
   2,757.78x = 4,131.24 × 1,715.34
4. Step 4: Simplify right side
   2,757.78x = 7,086,481.22
5. Step 5: Solve for x
   x = 7,086,481.22/2,757.78
6. Step 6: Final answer
   x = 2,569.63