Finding the Fourth Proportional to 21,485.52, 32,229.90 and 13,971.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,485.52 : 32,229.90 = 13,971.96 : x
2. Step 2: Convert to fraction form
   21,485.52/32,229.90 = 13,971.96/x
3. Step 3: Cross multiply
   21,485.52x = 32,229.90 × 13,971.96
4. Step 4: Simplify right side
   21,485.52x = 450,314,873.60
5. Step 5: Solve for x
   x = 450,314,873.60/21,485.52
6. Step 6: Final answer
   x = 20,958.99