Finding the Fourth Proportional to 10,990.50, 15,166.17 and 7,011.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.50 : 15,166.17 = 7,011.18 : x
2. Step 2: Convert to fraction form
   10,990.50/15,166.17 = 7,011.18/x
3. Step 3: Cross multiply
   10,990.50x = 15,166.17 × 7,011.18
4. Step 4: Simplify right side
   10,990.50x = 106,332,712.72
5. Step 5: Solve for x
   x = 106,332,712.72/10,990.50
6. Step 6: Final answer
   x = 9,674.97