Finding the Fourth Proportional to 21,076.71, 31,640.54 and 9,842.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,076.71 : 31,640.54 = 9,842.73 : x
2. Step 2: Convert to fraction form
   21,076.71/31,640.54 = 9,842.73/x
3. Step 3: Cross multiply
   21,076.71x = 31,640.54 × 9,842.73
4. Step 4: Simplify right side
   21,076.71x = 311,429,243.06
5. Step 5: Solve for x
   x = 311,429,243.06/21,076.71
6. Step 6: Final answer
   x = 14,775.99