Finding the Fourth Proportional to 16,671.72, 23,006.12 and 9,116.58

Step by Step Solution

1. Step 1: Write the proportion equation
   16,671.72 : 23,006.12 = 9,116.58 : x
2. Step 2: Convert to fraction form
   16,671.72/23,006.12 = 9,116.58/x
3. Step 3: Cross multiply
   16,671.72x = 23,006.12 × 9,116.58
4. Step 4: Simplify right side
   16,671.72x = 209,737,087.89
5. Step 5: Solve for x
   x = 209,737,087.89/16,671.72
6. Step 6: Final answer
   x = 12,580.41