Finding the Fourth Proportional to 22,216.78, 30,659.21 and 12,145.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.78 : 30,659.21 = 12,145.34 : x
2. Step 2: Convert to fraction form
   22,216.78/30,659.21 = 12,145.34/x
3. Step 3: Cross multiply
   22,216.78x = 30,659.21 × 12,145.34
4. Step 4: Simplify right side
   22,216.78x = 372,366,406.65
5. Step 5: Solve for x
   x = 372,366,406.65/22,216.78
6. Step 6: Final answer
   x = 16,760.59