Finding the Fourth Proportional to 21,648.42, 32,467.16 and 11,112.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,648.42 : 32,467.16 = 11,112.55 : x
2. Step 2: Convert to fraction form
   21,648.42/32,467.16 = 11,112.55/x
3. Step 3: Cross multiply
   21,648.42x = 32,467.16 × 11,112.55
4. Step 4: Simplify right side
   21,648.42x = 360,792,885.47
5. Step 5: Solve for x
   x = 360,792,885.47/21,648.42
6. Step 6: Final answer
   x = 16,666.01