Finding the Fourth Proportional to 22,479.38, 31,021.15 and 12,407.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.38 : 31,021.15 = 12,407.81 : x
2. Step 2: Convert to fraction form
   22,479.38/31,021.15 = 12,407.81/x
3. Step 3: Cross multiply
   22,479.38x = 31,021.15 × 12,407.81
4. Step 4: Simplify right side
   22,479.38x = 384,904,473.14
5. Step 5: Solve for x
   x = 384,904,473.14/22,479.38
6. Step 6: Final answer
   x = 17,122.56