Finding the Fourth Proportional to 1,222.78, 1,829.94 and 754.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.78 : 1,829.94 = 754.07 : x
2. Step 2: Convert to fraction form
   1,222.78/1,829.94 = 754.07/x
3. Step 3: Cross multiply
   1,222.78x = 1,829.94 × 754.07
4. Step 4: Simplify right side
   1,222.78x = 1,379,895.12
5. Step 5: Solve for x
   x = 1,379,895.12/1,222.78
6. Step 6: Final answer
   x = 1,128.49