Finding the Fourth Proportional to 21,096.96, 31,635.72 and 12,334.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.96 : 31,635.72 = 12,334.56 : x
2. Step 2: Convert to fraction form
   21,096.96/31,635.72 = 12,334.56/x
3. Step 3: Cross multiply
   21,096.96x = 31,635.72 × 12,334.56
4. Step 4: Simplify right side
   21,096.96x = 390,212,686.48
5. Step 5: Solve for x
   x = 390,212,686.48/21,096.96
6. Step 6: Final answer
   x = 18,496.16