Finding the Fourth Proportional to 1,009.50, 1,391.22 and 729.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.50 : 1,391.22 = 729.24 : x
2. Step 2: Convert to fraction form
   1,009.50/1,391.22 = 729.24/x
3. Step 3: Cross multiply
   1,009.50x = 1,391.22 × 729.24
4. Step 4: Simplify right side
   1,009.50x = 1,014,533.27
5. Step 5: Solve for x
   x = 1,014,533.27/1,009.50
6. Step 6: Final answer
   x = 1,004.99