Finding the Fourth Proportional to 21,493.32, 29,660.78 and 12,061.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,493.32 : 29,660.78 = 12,061.88 : x
2. Step 2: Convert to fraction form
   21,493.32/29,660.78 = 12,061.88/x
3. Step 3: Cross multiply
   21,493.32x = 29,660.78 × 12,061.88
4. Step 4: Simplify right side
   21,493.32x = 357,764,560.45
5. Step 5: Solve for x
   x = 357,764,560.45/21,493.32
6. Step 6: Final answer
   x = 16,645.38