Finding the Fourth Proportional to 10,976.20, 16,469.54 and 5,131.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,976.20 : 16,469.54 = 5,131.96 : x
2. Step 2: Convert to fraction form
   10,976.20/16,469.54 = 5,131.96/x
3. Step 3: Cross multiply
   10,976.20x = 16,469.54 × 5,131.96
4. Step 4: Simplify right side
   10,976.20x = 84,521,020.50
5. Step 5: Solve for x
   x = 84,521,020.50/10,976.20
6. Step 6: Final answer
   x = 7,700.39