Finding the Fourth Proportional to 2,180.16, 3,270.64 and 719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.16 : 3,270.64 = 719.72 : x
2. Step 2: Convert to fraction form
   2,180.16/3,270.64 = 719.72/x
3. Step 3: Cross multiply
   2,180.16x = 3,270.64 × 719.72
4. Step 4: Simplify right side
   2,180.16x = 2,353,945.02
5. Step 5: Solve for x
   x = 2,353,945.02/2,180.16
6. Step 6: Final answer
   x = 1,079.71