Finding the Fourth Proportional to 21,096.12, 31,648.50 and 7,057.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.12 : 31,648.50 = 7,057.56 : x
2. Step 2: Convert to fraction form
   21,096.12/31,648.50 = 7,057.56/x
3. Step 3: Cross multiply
   21,096.12x = 31,648.50 × 7,057.56
4. Step 4: Simplify right side
   21,096.12x = 223,361,187.66
5. Step 5: Solve for x
   x = 223,361,187.66/21,096.12
6. Step 6: Final answer
   x = 10,587.79