Finding the Fourth Proportional to 10,990.83, 15,169.64 and 10,105.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.83 : 15,169.64 = 10,105.23 : x
2. Step 2: Convert to fraction form
   10,990.83/15,169.64 = 10,105.23/x
3. Step 3: Cross multiply
   10,990.83x = 15,169.64 × 10,105.23
4. Step 4: Simplify right side
   10,990.83x = 153,292,650.69
5. Step 5: Solve for x
   x = 153,292,650.69/10,990.83
6. Step 6: Final answer
   x = 13,947.32