Finding the Fourth Proportional to 16,220.51, 22,385.06 and 9,146.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,220.51 : 22,385.06 = 9,146.78 : x
2. Step 2: Convert to fraction form
   16,220.51/22,385.06 = 9,146.78/x
3. Step 3: Cross multiply
   16,220.51x = 22,385.06 × 9,146.78
4. Step 4: Simplify right side
   16,220.51x = 204,751,061.45
5. Step 5: Solve for x
   x = 204,751,061.45/16,220.51
6. Step 6: Final answer
   x = 12,622.98