Finding the Fourth Proportional to 20,738.72, 30,948.82 and 18,524.16

Step by Step Solution

1. Step 1: Write the proportion equation
   20,738.72 : 30,948.82 = 18,524.16 : x
2. Step 2: Convert to fraction form
   20,738.72/30,948.82 = 18,524.16/x
3. Step 3: Cross multiply
   20,738.72x = 30,948.82 × 18,524.16
4. Step 4: Simplify right side
   20,738.72x = 573,300,893.49
5. Step 5: Solve for x
   x = 573,300,893.49/20,738.72
6. Step 6: Final answer
   x = 27,643.99