Finding the Fourth Proportional to 16,485.35, 22,748.39 and 9,315.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,485.35 : 22,748.39 = 9,315.89 : x
2. Step 2: Convert to fraction form
   16,485.35/22,748.39 = 9,315.89/x
3. Step 3: Cross multiply
   16,485.35x = 22,748.39 × 9,315.89
4. Step 4: Simplify right side
   16,485.35x = 211,921,447.26
5. Step 5: Solve for x
   x = 211,921,447.26/16,485.35
6. Step 6: Final answer
   x = 12,855.14