Finding the Fourth Proportional to 1,291.86, 1,936.83 and 633.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.86 : 1,936.83 = 633.54 : x
2. Step 2: Convert to fraction form
   1,291.86/1,936.83 = 633.54/x
3. Step 3: Cross multiply
   1,291.86x = 1,936.83 × 633.54
4. Step 4: Simplify right side
   1,291.86x = 1,227,059.28
5. Step 5: Solve for x
   x = 1,227,059.28/1,291.86
6. Step 6: Final answer
   x = 949.84