Finding the Fourth Proportional to 15,932.45, 21,991.37 and 9,222.62

Step by Step Solution

1. Step 1: Write the proportion equation
   15,932.45 : 21,991.37 = 9,222.62 : x
2. Step 2: Convert to fraction form
   15,932.45/21,991.37 = 9,222.62/x
3. Step 3: Cross multiply
   15,932.45x = 21,991.37 × 9,222.62
4. Step 4: Simplify right side
   15,932.45x = 202,817,892.72
5. Step 5: Solve for x
   x = 202,817,892.72/15,932.45
6. Step 6: Final answer
   x = 12,729.86