Finding the Fourth Proportional to 2,191.72, 3,287.94 and 730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.72 : 3,287.94 = 730.72 : x
2. Step 2: Convert to fraction form
   2,191.72/3,287.94 = 730.72/x
3. Step 3: Cross multiply
   2,191.72x = 3,287.94 × 730.72
4. Step 4: Simplify right side
   2,191.72x = 2,402,563.52
5. Step 5: Solve for x
   x = 2,402,563.52/2,191.72
6. Step 6: Final answer
   x = 1,096.20