Finding the Fourth Proportional to 1,991.33, 2,747.89 and 1,107.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.33 : 2,747.89 = 1,107.10 : x
2. Step 2: Convert to fraction form
   1,991.33/2,747.89 = 1,107.10/x
3. Step 3: Cross multiply
   1,991.33x = 2,747.89 × 1,107.10
4. Step 4: Simplify right side
   1,991.33x = 3,042,189.02
5. Step 5: Solve for x
   x = 3,042,189.02/1,991.33
6. Step 6: Final answer
   x = 1,527.72