Finding the Fourth Proportional to 21,719.34, 29,940 and 16,995.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,719.34 : 29,940 = 16,995.42 : x
2. Step 2: Convert to fraction form
   21,719.34/29,940 = 16,995.42/x
3. Step 3: Cross multiply
   21,719.34x = 29,940 × 16,995.42
4. Step 4: Simplify right side
   21,719.34x = 508,842,874.80
5. Step 5: Solve for x
   x = 508,842,874.80/21,719.34
6. Step 6: Final answer
   x = 23,428.10