Finding the Fourth Proportional to 21,224.42, 31,821.38 and 9,973.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,224.42 : 31,821.38 = 9,973.42 : x
2. Step 2: Convert to fraction form
   21,224.42/31,821.38 = 9,973.42/x
3. Step 3: Cross multiply
   21,224.42x = 31,821.38 × 9,973.42
4. Step 4: Simplify right side
   21,224.42x = 317,367,987.72
5. Step 5: Solve for x
   x = 317,367,987.72/21,224.42
6. Step 6: Final answer
   x = 14,952.96