Finding the Fourth Proportional to 12,100.50, 16,660.50 and 10,993.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,100.50 : 16,660.50 = 10,993.20 : x
2. Step 2: Convert to fraction form
   12,100.50/16,660.50 = 10,993.20/x
3. Step 3: Cross multiply
   12,100.50x = 16,660.50 × 10,993.20
4. Step 4: Simplify right side
   12,100.50x = 183,152,208.60
5. Step 5: Solve for x
   x = 183,152,208.60/12,100.50
6. Step 6: Final answer
   x = 15,135.92