Finding the Fourth Proportional to 2,010.78, 2,774.52 and 1,224.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.78 : 2,774.52 = 1,224.54 : x
2. Step 2: Convert to fraction form
   2,010.78/2,774.52 = 1,224.54/x
3. Step 3: Cross multiply
   2,010.78x = 2,774.52 × 1,224.54
4. Step 4: Simplify right side
   2,010.78x = 3,397,510.72
5. Step 5: Solve for x
   x = 3,397,510.72/2,010.78
6. Step 6: Final answer
   x = 1,689.65