Finding the Fourth Proportional to 1,991.16, 2,747.61 and 1,107

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.16 : 2,747.61 = 1,107 : x
2. Step 2: Convert to fraction form
   1,991.16/2,747.61 = 1,107/x
3. Step 3: Cross multiply
   1,991.16x = 2,747.61 × 1,107
4. Step 4: Simplify right side
   1,991.16x = 3,041,604.27
5. Step 5: Solve for x
   x = 3,041,604.27/1,991.16
6. Step 6: Final answer
   x = 1,527.55