Finding the Fourth Proportional to 2,911.12, 4,366.63 and 719.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.12 : 4,366.63 = 719.86 : x
2. Step 2: Convert to fraction form
   2,911.12/4,366.63 = 719.86/x
3. Step 3: Cross multiply
   2,911.12x = 4,366.63 × 719.86
4. Step 4: Simplify right side
   2,911.12x = 3,143,362.27
5. Step 5: Solve for x
   x = 3,143,362.27/2,911.12
6. Step 6: Final answer
   x = 1,079.78