Finding the Fourth Proportional to 16,485, 22,748.82 and 9,678.91

Step by Step Solution

1. Step 1: Write the proportion equation
   16,485 : 22,748.82 = 9,678.91 : x
2. Step 2: Convert to fraction form
   16,485/22,748.82 = 9,678.91/x
3. Step 3: Cross multiply
   16,485x = 22,748.82 × 9,678.91
4. Step 4: Simplify right side
   16,485x = 220,183,781.39
5. Step 5: Solve for x
   x = 220,183,781.39/16,485
6. Step 6: Final answer
   x = 13,356.61