Finding the Fourth Proportional to 1,991.69, 2,747.81 and 1,195.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.69 : 2,747.81 = 1,195.05 : x
2. Step 2: Convert to fraction form
   1,991.69/2,747.81 = 1,195.05/x
3. Step 3: Cross multiply
   1,991.69x = 2,747.81 × 1,195.05
4. Step 4: Simplify right side
   1,991.69x = 3,283,764.37
5. Step 5: Solve for x
   x = 3,283,764.37/1,991.69
6. Step 6: Final answer
   x = 1,648.74