Finding the Fourth Proportional to 21,447, 32,187.78 and 11,061.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,447 : 32,187.78 = 11,061.72 : x
2. Step 2: Convert to fraction form
   21,447/32,187.78 = 11,061.72/x
3. Step 3: Cross multiply
   21,447x = 32,187.78 × 11,061.72
4. Step 4: Simplify right side
   21,447x = 356,052,209.78
5. Step 5: Solve for x
   x = 356,052,209.78/21,447
6. Step 6: Final answer
   x = 16,601.49