Finding the Fourth Proportional to 9,891.27, 13,649.61 and 5,910.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,891.27 : 13,649.61 = 5,910.03 : x
2. Step 2: Convert to fraction form
   9,891.27/13,649.61 = 5,910.03/x
3. Step 3: Cross multiply
   9,891.27x = 13,649.61 × 5,910.03
4. Step 4: Simplify right side
   9,891.27x = 80,669,604.59
5. Step 5: Solve for x
   x = 80,669,604.59/9,891.27
6. Step 6: Final answer
   x = 8,155.64