Finding the Fourth Proportional to 1,768.78, 2,650.20 and 1,151.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.78 : 2,650.20 = 1,151.56 : x
2. Step 2: Convert to fraction form
   1,768.78/2,650.20 = 1,151.56/x
3. Step 3: Cross multiply
   1,768.78x = 2,650.20 × 1,151.56
4. Step 4: Simplify right side
   1,768.78x = 3,051,864.31
5. Step 5: Solve for x
   x = 3,051,864.31/1,768.78
6. Step 6: Final answer
   x = 1,725.41