Finding the Fourth Proportional to 10,826.96, 16,230.84 and 5,277.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,826.96 : 16,230.84 = 5,277.20 : x
2. Step 2: Convert to fraction form
   10,826.96/16,230.84 = 5,277.20/x
3. Step 3: Cross multiply
   10,826.96x = 16,230.84 × 5,277.20
4. Step 4: Simplify right side
   10,826.96x = 85,653,388.85
5. Step 5: Solve for x
   x = 85,653,388.85/10,826.96
6. Step 6: Final answer
   x = 7,911.12