Finding the Fourth Proportional to 1,139.85, 1,710.50 and 729.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.85 : 1,710.50 = 729.27 : x
2. Step 2: Convert to fraction form
   1,139.85/1,710.50 = 729.27/x
3. Step 3: Cross multiply
   1,139.85x = 1,710.50 × 729.27
4. Step 4: Simplify right side
   1,139.85x = 1,247,412.69
5. Step 5: Solve for x
   x = 1,247,412.69/1,139.85
6. Step 6: Final answer
   x = 1,094.37