Finding the Fourth Proportional to 16,660.68, 24,978.54 and 10,085.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,660.68 : 24,978.54 = 10,085.28 : x
2. Step 2: Convert to fraction form
   16,660.68/24,978.54 = 10,085.28/x
3. Step 3: Cross multiply
   16,660.68x = 24,978.54 × 10,085.28
4. Step 4: Simplify right side
   16,660.68x = 251,915,569.89
5. Step 5: Solve for x
   x = 251,915,569.89/16,660.68
6. Step 6: Final answer
   x = 15,120.37