Finding the Fourth Proportional to 21,647.52, 32,419.40 and 13,722.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,647.52 : 32,419.40 = 13,722.48 : x
2. Step 2: Convert to fraction form
   21,647.52/32,419.40 = 13,722.48/x
3. Step 3: Cross multiply
   21,647.52x = 32,419.40 × 13,722.48
4. Step 4: Simplify right side
   21,647.52x = 444,874,499.50
5. Step 5: Solve for x
   x = 444,874,499.50/21,647.52
6. Step 6: Final answer
   x = 20,550.83