Finding the Fourth Proportional to 22,120.72, 33,146.52 and 12,766.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,120.72 : 33,146.52 = 12,766.48 : x
2. Step 2: Convert to fraction form
   22,120.72/33,146.52 = 12,766.48/x
3. Step 3: Cross multiply
   22,120.72x = 33,146.52 × 12,766.48
4. Step 4: Simplify right side
   22,120.72x = 423,164,384.65
5. Step 5: Solve for x
   x = 423,164,384.65/22,120.72
6. Step 6: Final answer
   x = 19,129.77