Finding the Fourth Proportional to 21,700.86, 29,975.31 and 16,047.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,700.86 : 29,975.31 = 16,047.06 : x
2. Step 2: Convert to fraction form
   21,700.86/29,975.31 = 16,047.06/x
3. Step 3: Cross multiply
   21,700.86x = 29,975.31 × 16,047.06
4. Step 4: Simplify right side
   21,700.86x = 481,015,598.09
5. Step 5: Solve for x
   x = 481,015,598.09/21,700.86
6. Step 6: Final answer
   x = 22,165.74