Finding the Fourth Proportional to 10,965.98, 16,443.05 and 5,687.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,965.98 : 16,443.05 = 5,687.91 : x
2. Step 2: Convert to fraction form
   10,965.98/16,443.05 = 5,687.91/x
3. Step 3: Cross multiply
   10,965.98x = 16,443.05 × 5,687.91
4. Step 4: Simplify right side
   10,965.98x = 93,526,568.96
5. Step 5: Solve for x
   x = 93,526,568.96/10,965.98
6. Step 6: Final answer
   x = 8,528.79