Finding the Fourth Proportional to 1,139.27, 1,567.49 and 1,107

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.27 : 1,567.49 = 1,107 : x
2. Step 2: Convert to fraction form
   1,139.27/1,567.49 = 1,107/x
3. Step 3: Cross multiply
   1,139.27x = 1,567.49 × 1,107
4. Step 4: Simplify right side
   1,139.27x = 1,735,205.90
5. Step 5: Solve for x
   x = 1,735,205.90/1,139.27
6. Step 6: Final answer
   x = 1,523.09