Finding the Fourth Proportional to 10,865.10, 14,994.81 and 6,386.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,865.10 : 14,994.81 = 6,386.61 : x
2. Step 2: Convert to fraction form
   10,865.10/14,994.81 = 6,386.61/x
3. Step 3: Cross multiply
   10,865.10x = 14,994.81 × 6,386.61
4. Step 4: Simplify right side
   10,865.10x = 95,766,003.49
5. Step 5: Solve for x
   x = 95,766,003.49/10,865.10
6. Step 6: Final answer
   x = 8,814.09