Finding the Fourth Proportional to 21,493.42, 29,660.92 and 12,061.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,493.42 : 29,660.92 = 12,061.98 : x
2. Step 2: Convert to fraction form
   21,493.42/29,660.92 = 12,061.98/x
3. Step 3: Cross multiply
   21,493.42x = 29,660.92 × 12,061.98
4. Step 4: Simplify right side
   21,493.42x = 357,769,423.82
5. Step 5: Solve for x
   x = 357,769,423.82/21,493.42
6. Step 6: Final answer
   x = 16,645.53