Finding the Fourth Proportional to 2,191.50, 3,285.18 and 729.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.50 : 3,285.18 = 729.60 : x
2. Step 2: Convert to fraction form
   2,191.50/3,285.18 = 729.60/x
3. Step 3: Cross multiply
   2,191.50x = 3,285.18 × 729.60
4. Step 4: Simplify right side
   2,191.50x = 2,396,867.33
5. Step 5: Solve for x
   x = 2,396,867.33/2,191.50
6. Step 6: Final answer
   x = 1,093.71