Finding the Fourth Proportional to 16,405.89, 22,637.69 and 9,234.77

Step by Step Solution

1. Step 1: Write the proportion equation
   16,405.89 : 22,637.69 = 9,234.77 : x
2. Step 2: Convert to fraction form
   16,405.89/22,637.69 = 9,234.77/x
3. Step 3: Cross multiply
   16,405.89x = 22,637.69 × 9,234.77
4. Step 4: Simplify right side
   16,405.89x = 209,053,701.12
5. Step 5: Solve for x
   x = 209,053,701.12/16,405.89
6. Step 6: Final answer
   x = 12,742.60