Finding the Fourth Proportional to 16,221.89, 24,332.68 and 5,128.58

Step by Step Solution

1. Step 1: Write the proportion equation
   16,221.89 : 24,332.68 = 5,128.58 : x
2. Step 2: Convert to fraction form
   16,221.89/24,332.68 = 5,128.58/x
3. Step 3: Cross multiply
   16,221.89x = 24,332.68 × 5,128.58
4. Step 4: Simplify right side
   16,221.89x = 124,792,026.37
5. Step 5: Solve for x
   x = 124,792,026.37/16,221.89
6. Step 6: Final answer
   x = 7,692.82