Finding the Fourth Proportional to 21,662.12, 32,419.25 and 18,156.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,662.12 : 32,419.25 = 18,156.09 : x
2. Step 2: Convert to fraction form
   21,662.12/32,419.25 = 18,156.09/x
3. Step 3: Cross multiply
   21,662.12x = 32,419.25 × 18,156.09
4. Step 4: Simplify right side
   21,662.12x = 588,606,866.12
5. Step 5: Solve for x
   x = 588,606,866.12/21,662.12
6. Step 6: Final answer
   x = 27,172.17