Finding the Fourth Proportional to 21,544.58, 29,728.32 and 12,111.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,544.58 : 29,728.32 = 12,111.32 : x
2. Step 2: Convert to fraction form
   21,544.58/29,728.32 = 12,111.32/x
3. Step 3: Cross multiply
   21,544.58x = 29,728.32 × 12,111.32
4. Step 4: Simplify right side
   21,544.58x = 360,049,225.49
5. Step 5: Solve for x
   x = 360,049,225.49/21,544.58
6. Step 6: Final answer
   x = 16,711.82