Finding the Fourth Proportional to 2,181.29, 3,272.27 and 720.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.29 : 3,272.27 = 720.32 : x
2. Step 2: Convert to fraction form
   2,181.29/3,272.27 = 720.32/x
3. Step 3: Cross multiply
   2,181.29x = 3,272.27 × 720.32
4. Step 4: Simplify right side
   2,181.29x = 2,357,061.56
5. Step 5: Solve for x
   x = 2,357,061.56/2,181.29
6. Step 6: Final answer
   x = 1,080.58