Finding the Fourth Proportional to 21,843.50, 32,770.20 and 7,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,843.50 : 32,770.20 = 7,992.50 : x
2. Step 2: Convert to fraction form
   21,843.50/32,770.20 = 7,992.50/x
3. Step 3: Cross multiply
   21,843.50x = 32,770.20 × 7,992.50
4. Step 4: Simplify right side
   21,843.50x = 261,915,823.50
5. Step 5: Solve for x
   x = 261,915,823.50/21,843.50
6. Step 6: Final answer
   x = 11,990.56