Finding the Fourth Proportional to 21,555.05, 29,744.82 and 12,123

Step by Step Solution

1. Step 1: Write the proportion equation
   21,555.05 : 29,744.82 = 12,123 : x
2. Step 2: Convert to fraction form
   21,555.05/29,744.82 = 12,123/x
3. Step 3: Cross multiply
   21,555.05x = 29,744.82 × 12,123
4. Step 4: Simplify right side
   21,555.05x = 360,596,452.86
5. Step 5: Solve for x
   x = 360,596,452.86/21,555.05
6. Step 6: Final answer
   x = 16,729.10