Finding the Fourth Proportional to 10,826.08, 16,228.56 and 5,279.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,826.08 : 16,228.56 = 5,279.20 : x
2. Step 2: Convert to fraction form
   10,826.08/16,228.56 = 5,279.20/x
3. Step 3: Cross multiply
   10,826.08x = 16,228.56 × 5,279.20
4. Step 4: Simplify right side
   10,826.08x = 85,673,813.95
5. Step 5: Solve for x
   x = 85,673,813.95/10,826.08
6. Step 6: Final answer
   x = 7,913.65