Finding the Fourth Proportional to 21,710.16, 29,973.46 and 16,664.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,710.16 : 29,973.46 = 16,664.72 : x
2. Step 2: Convert to fraction form
   21,710.16/29,973.46 = 16,664.72/x
3. Step 3: Cross multiply
   21,710.16x = 29,973.46 × 16,664.72
4. Step 4: Simplify right side
   21,710.16x = 499,499,318.33
5. Step 5: Solve for x
   x = 499,499,318.33/21,710.16
6. Step 6: Final answer
   x = 23,007.63