Finding the Fourth Proportional to 2,115.82, 3,173.81 and 729.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.82 : 3,173.81 = 729.15 : x
2. Step 2: Convert to fraction form
   2,115.82/3,173.81 = 729.15/x
3. Step 3: Cross multiply
   2,115.82x = 3,173.81 × 729.15
4. Step 4: Simplify right side
   2,115.82x = 2,314,183.56
5. Step 5: Solve for x
   x = 2,314,183.56/2,115.82
6. Step 6: Final answer
   x = 1,093.75