Finding the Fourth Proportional to 2,910.77, 4,363.40 and 961.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,910.77 : 4,363.40 = 961.91 : x
2. Step 2: Convert to fraction form
   2,910.77/4,363.40 = 961.91/x
3. Step 3: Cross multiply
   2,910.77x = 4,363.40 × 961.91
4. Step 4: Simplify right side
   2,910.77x = 4,197,171.47
5. Step 5: Solve for x
   x = 4,197,171.47/2,910.77
6. Step 6: Final answer
   x = 1,441.95