Finding the Fourth Proportional to 21,669.52, 32,477.70 and 12,317.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,669.52 : 32,477.70 = 12,317.38 : x
2. Step 2: Convert to fraction form
   21,669.52/32,477.70 = 12,317.38/x
3. Step 3: Cross multiply
   21,669.52x = 32,477.70 × 12,317.38
4. Step 4: Simplify right side
   21,669.52x = 400,040,172.43
5. Step 5: Solve for x
   x = 400,040,172.43/21,669.52
6. Step 6: Final answer
   x = 18,460.96