Finding the Fourth Proportional to 2,181.20, 3,272.00 and 719.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.20 : 3,272.00 = 719.96 : x
2. Step 2: Convert to fraction form
   2,181.20/3,272.00 = 719.96/x
3. Step 3: Cross multiply
   2,181.20x = 3,272.00 × 719.96
4. Step 4: Simplify right side
   2,181.20x = 2,355,689.16
5. Step 5: Solve for x
   x = 2,355,689.16/2,181.20
6. Step 6: Final answer
   x = 1,080.00