Finding the Fourth Proportional to 10,786.17, 16,181.87 and 5,519.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.17 : 16,181.87 = 5,519.01 : x
2. Step 2: Convert to fraction form
   10,786.17/16,181.87 = 5,519.01/x
3. Step 3: Cross multiply
   10,786.17x = 16,181.87 × 5,519.01
4. Step 4: Simplify right side
   10,786.17x = 89,307,874.75
5. Step 5: Solve for x
   x = 89,307,874.75/10,786.17
6. Step 6: Final answer
   x = 8,279.85