Finding the Fourth Proportional to 1,122.89, 1,549.71 and 650.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,122.89 : 1,549.71 = 650.78 : x
2. Step 2: Convert to fraction form
   1,122.89/1,549.71 = 650.78/x
3. Step 3: Cross multiply
   1,122.89x = 1,549.71 × 650.78
4. Step 4: Simplify right side
   1,122.89x = 1,008,509.27
5. Step 5: Solve for x
   x = 1,008,509.27/1,122.89
6. Step 6: Final answer
   x = 898.14