Finding the Fourth Proportional to 16,121.63, 22,276.72 and 12,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,121.63 : 22,276.72 = 12,611.50 : x
2. Step 2: Convert to fraction form
   16,121.63/22,276.72 = 12,611.50/x
3. Step 3: Cross multiply
   16,121.63x = 22,276.72 × 12,611.50
4. Step 4: Simplify right side
   16,121.63x = 280,942,814.35
5. Step 5: Solve for x
   x = 280,942,814.35/16,121.63
6. Step 6: Final answer
   x = 17,426.45