Finding the Fourth Proportional to 22,216.85, 30,659.17 and 12,145.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.85 : 30,659.17 = 12,145.30 : x
2. Step 2: Convert to fraction form
   22,216.85/30,659.17 = 12,145.30/x
3. Step 3: Cross multiply
   22,216.85x = 30,659.17 × 12,145.30
4. Step 4: Simplify right side
   22,216.85x = 372,364,603.38
5. Step 5: Solve for x
   x = 372,364,603.38/22,216.85
6. Step 6: Final answer
   x = 16,760.46