Finding the Fourth Proportional to 1,109.34, 1,531.43 and 757.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.34 : 1,531.43 = 757.09 : x
2. Step 2: Convert to fraction form
   1,109.34/1,531.43 = 757.09/x
3. Step 3: Cross multiply
   1,109.34x = 1,531.43 × 757.09
4. Step 4: Simplify right side
   1,109.34x = 1,159,430.34
5. Step 5: Solve for x
   x = 1,159,430.34/1,109.34
6. Step 6: Final answer
   x = 1,045.15