Finding the Fourth Proportional to 21,928.86, 32,906.25 and 10,836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928.86 : 32,906.25 = 10,836.72 : x
2. Step 2: Convert to fraction form
   21,928.86/32,906.25 = 10,836.72/x
3. Step 3: Cross multiply
   21,928.86x = 32,906.25 × 10,836.72
4. Step 4: Simplify right side
   21,928.86x = 356,595,817.50
5. Step 5: Solve for x
   x = 356,595,817.50/21,928.86
6. Step 6: Final answer
   x = 16,261.48