Finding the Fourth Proportional to 22,479.89, 31,021.81 and 12,407.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.89 : 31,021.81 = 12,407.74 : x
2. Step 2: Convert to fraction form
   22,479.89/31,021.81 = 12,407.74/x
3. Step 3: Cross multiply
   22,479.89x = 31,021.81 × 12,407.74
4. Step 4: Simplify right side
   22,479.89x = 384,910,444.24
5. Step 5: Solve for x
   x = 384,910,444.24/22,479.89
6. Step 6: Final answer
   x = 17,122.44