Finding the Fourth Proportional to 2,910.72, 4,366.33 and 830.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,910.72 : 4,366.33 = 830.68 : x
2. Step 2: Convert to fraction form
   2,910.72/4,366.33 = 830.68/x
3. Step 3: Cross multiply
   2,910.72x = 4,366.33 × 830.68
4. Step 4: Simplify right side
   2,910.72x = 3,627,025.08
5. Step 5: Solve for x
   x = 3,627,025.08/2,910.72
6. Step 6: Final answer
   x = 1,246.09