Finding the Fourth Proportional to 3,300.65, 4,950.80 and 1,109.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,300.65 : 4,950.80 = 1,109.15 : x
2. Step 2: Convert to fraction form
   3,300.65/4,950.80 = 1,109.15/x
3. Step 3: Cross multiply
   3,300.65x = 4,950.80 × 1,109.15
4. Step 4: Simplify right side
   3,300.65x = 5,491,174.27
5. Step 5: Solve for x
   x = 5,491,174.27/3,300.65
6. Step 6: Final answer
   x = 1,663.66