Finding the Fourth Proportional to 21,016.08, 31,534.20 and 14,076.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.08 : 31,534.20 = 14,076.72 : x
2. Step 2: Convert to fraction form
   21,016.08/31,534.20 = 14,076.72/x
3. Step 3: Cross multiply
   21,016.08x = 31,534.20 × 14,076.72
4. Step 4: Simplify right side
   21,016.08x = 443,898,103.82
5. Step 5: Solve for x
   x = 443,898,103.82/21,016.08
6. Step 6: Final answer
   x = 21,121.83