Finding the Fourth Proportional to 16,638.72, 22,961.49 and 9,085.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,638.72 : 22,961.49 = 9,085.12 : x
2. Step 2: Convert to fraction form
   16,638.72/22,961.49 = 9,085.12/x
3. Step 3: Cross multiply
   16,638.72x = 22,961.49 × 9,085.12
4. Step 4: Simplify right side
   16,638.72x = 208,607,731.80
5. Step 5: Solve for x
   x = 208,607,731.80/16,638.72
6. Step 6: Final answer
   x = 12,537.49