Finding the Fourth Proportional to 16,072.58, 22,180.36 and 9,699.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,072.58 : 22,180.36 = 9,699.50 : x
2. Step 2: Convert to fraction form
   16,072.58/22,180.36 = 9,699.50/x
3. Step 3: Cross multiply
   16,072.58x = 22,180.36 × 9,699.50
4. Step 4: Simplify right side
   16,072.58x = 215,138,401.82
5. Step 5: Solve for x
   x = 215,138,401.82/16,072.58
6. Step 6: Final answer
   x = 13,385.43