Finding the Fourth Proportional to 2,018.64, 3,025.80 and 719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.64 : 3,025.80 = 719.72 : x
2. Step 2: Convert to fraction form
   2,018.64/3,025.80 = 719.72/x
3. Step 3: Cross multiply
   2,018.64x = 3,025.80 × 719.72
4. Step 4: Simplify right side
   2,018.64x = 2,177,728.78
5. Step 5: Solve for x
   x = 2,177,728.78/2,018.64
6. Step 6: Final answer
   x = 1,078.81