Finding the Fourth Proportional to 1,009.96, 1,393.31 and 729.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.96 : 1,393.31 = 729.57 : x
2. Step 2: Convert to fraction form
   1,009.96/1,393.31 = 729.57/x
3. Step 3: Cross multiply
   1,009.96x = 1,393.31 × 729.57
4. Step 4: Simplify right side
   1,009.96x = 1,016,517.18
5. Step 5: Solve for x
   x = 1,016,517.18/1,009.96
6. Step 6: Final answer
   x = 1,006.49