Finding the Fourth Proportional to 21,549.42, 29,739.33 and 12,118.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,549.42 : 29,739.33 = 12,118.59 : x
2. Step 2: Convert to fraction form
   21,549.42/29,739.33 = 12,118.59/x
3. Step 3: Cross multiply
   21,549.42x = 29,739.33 × 12,118.59
4. Step 4: Simplify right side
   21,549.42x = 360,398,747.14
5. Step 5: Solve for x
   x = 360,398,747.14/21,549.42
6. Step 6: Final answer
   x = 16,724.29