Finding the Fourth Proportional to 21,871.90, 30,190.52 and 14,699.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,871.90 : 30,190.52 = 14,699.42 : x
2. Step 2: Convert to fraction form
   21,871.90/30,190.52 = 14,699.42/x
3. Step 3: Cross multiply
   21,871.90x = 30,190.52 × 14,699.42
4. Step 4: Simplify right side
   21,871.90x = 443,783,133.50
5. Step 5: Solve for x
   x = 443,783,133.50/21,871.90
6. Step 6: Final answer
   x = 20,290.10