Finding the Fourth Proportional to 1,266.45, 1,896.18 and 648.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,266.45 : 1,896.18 = 648.83 : x
2. Step 2: Convert to fraction form
   1,266.45/1,896.18 = 648.83/x
3. Step 3: Cross multiply
   1,266.45x = 1,896.18 × 648.83
4. Step 4: Simplify right side
   1,266.45x = 1,230,293.73
5. Step 5: Solve for x
   x = 1,230,293.73/1,266.45
6. Step 6: Final answer
   x = 971.45