Finding the Fourth Proportional to 21,389.10, 32,116.05 and 16,464.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,389.10 : 32,116.05 = 16,464.30 : x
2. Step 2: Convert to fraction form
   21,389.10/32,116.05 = 16,464.30/x
3. Step 3: Cross multiply
   21,389.10x = 32,116.05 × 16,464.30
4. Step 4: Simplify right side
   21,389.10x = 528,768,282.02
5. Step 5: Solve for x
   x = 528,768,282.02/21,389.10
6. Step 6: Final answer
   x = 24,721.39