Finding the Fourth Proportional to 3,300.78, 4,951.11 and 1,109.19

Step by Step Solution

1. Step 1: Write the proportion equation
   3,300.78 : 4,951.11 = 1,109.19 : x
2. Step 2: Convert to fraction form
   3,300.78/4,951.11 = 1,109.19/x
3. Step 3: Cross multiply
   3,300.78x = 4,951.11 × 1,109.19
4. Step 4: Simplify right side
   3,300.78x = 5,491,721.70
5. Step 5: Solve for x
   x = 5,491,721.70/3,300.78
6. Step 6: Final answer
   x = 1,663.76