Finding the Fourth Proportional to 16,660.64, 24,978.61 and 10,085.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,660.64 : 24,978.61 = 10,085.27 : x
2. Step 2: Convert to fraction form
   16,660.64/24,978.61 = 10,085.27/x
3. Step 3: Cross multiply
   16,660.64x = 24,978.61 × 10,085.27
4. Step 4: Simplify right side
   16,660.64x = 251,915,875.97
5. Step 5: Solve for x
   x = 251,915,875.97/16,660.64
6. Step 6: Final answer
   x = 15,120.42