Finding the Fourth Proportional to 21,321.43, 31,981.23 and 7,282.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,321.43 : 31,981.23 = 7,282.71 : x
2. Step 2: Convert to fraction form
   21,321.43/31,981.23 = 7,282.71/x
3. Step 3: Cross multiply
   21,321.43x = 31,981.23 × 7,282.71
4. Step 4: Simplify right side
   21,321.43x = 232,910,023.53
5. Step 5: Solve for x
   x = 232,910,023.53/21,321.43
6. Step 6: Final answer
   x = 10,923.75