Finding the Fourth Proportional to 11,719.50, 16,172.91 and 8,737.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,719.50 : 16,172.91 = 8,737.89 : x
2. Step 2: Convert to fraction form
   11,719.50/16,172.91 = 8,737.89/x
3. Step 3: Cross multiply
   11,719.50x = 16,172.91 × 8,737.89
4. Step 4: Simplify right side
   11,719.50x = 141,317,108.56
5. Step 5: Solve for x
   x = 141,317,108.56/11,719.50
6. Step 6: Final answer
   x = 12,058.29