Finding the Fourth Proportional to 2,169.50, 2,993.91 and 1,174.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.50 : 2,993.91 = 1,174.78 : x
2. Step 2: Convert to fraction form
   2,169.50/2,993.91 = 1,174.78/x
3. Step 3: Cross multiply
   2,169.50x = 2,993.91 × 1,174.78
4. Step 4: Simplify right side
   2,169.50x = 3,517,185.59
5. Step 5: Solve for x
   x = 3,517,185.59/2,169.50
6. Step 6: Final answer
   x = 1,621.20