Finding the Fourth Proportional to 16,215.09, 22,376.71 and 9,499.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.09 : 22,376.71 = 9,499.28 : x
2. Step 2: Convert to fraction form
   16,215.09/22,376.71 = 9,499.28/x
3. Step 3: Cross multiply
   16,215.09x = 22,376.71 × 9,499.28
4. Step 4: Simplify right side
   16,215.09x = 212,562,633.77
5. Step 5: Solve for x
   x = 212,562,633.77/16,215.09
6. Step 6: Final answer
   x = 13,108.94