Finding the Fourth Proportional to 21,199.89, 31,906.17 and 15,962.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,199.89 : 31,906.17 = 15,962.04 : x
2. Step 2: Convert to fraction form
   21,199.89/31,906.17 = 15,962.04/x
3. Step 3: Cross multiply
   21,199.89x = 31,906.17 × 15,962.04
4. Step 4: Simplify right side
   21,199.89x = 509,287,561.79
5. Step 5: Solve for x
   x = 509,287,561.79/21,199.89
6. Step 6: Final answer
   x = 24,023.12