Finding the Fourth Proportional to 22,479.74, 31,019.83 and 12,407.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.74 : 31,019.83 = 12,407.54 : x
2. Step 2: Convert to fraction form
   22,479.74/31,019.83 = 12,407.54/x
3. Step 3: Cross multiply
   22,479.74x = 31,019.83 × 12,407.54
4. Step 4: Simplify right side
   22,479.74x = 384,879,781.52
5. Step 5: Solve for x
   x = 384,879,781.52/22,479.74
6. Step 6: Final answer
   x = 17,121.18