Finding the Fourth Proportional to 16,212.07, 22,368.72 and 9,138.48

Step by Step Solution

1. Step 1: Write the proportion equation
   16,212.07 : 22,368.72 = 9,138.48 : x
2. Step 2: Convert to fraction form
   16,212.07/22,368.72 = 9,138.48/x
3. Step 3: Cross multiply
   16,212.07x = 22,368.72 × 9,138.48
4. Step 4: Simplify right side
   16,212.07x = 204,416,100.35
5. Step 5: Solve for x
   x = 204,416,100.35/16,212.07
6. Step 6: Final answer
   x = 12,608.88