Finding the Fourth Proportional to 1,757.78, 2,636.83 and 717.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,757.78 : 2,636.83 = 717.86 : x
2. Step 2: Convert to fraction form
   1,757.78/2,636.83 = 717.86/x
3. Step 3: Cross multiply
   1,757.78x = 2,636.83 × 717.86
4. Step 4: Simplify right side
   1,757.78x = 1,892,874.78
5. Step 5: Solve for x
   x = 1,892,874.78/1,757.78
6. Step 6: Final answer
   x = 1,076.86