Finding the Fourth Proportional to 22,479.68, 31,019.60 and 12,407.94

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.68 : 31,019.60 = 12,407.94 : x
2. Step 2: Convert to fraction form
   22,479.68/31,019.60 = 12,407.94/x
3. Step 3: Cross multiply
   22,479.68x = 31,019.60 × 12,407.94
4. Step 4: Simplify right side
   22,479.68x = 384,889,335.62
5. Step 5: Solve for x
   x = 384,889,335.62/22,479.68
6. Step 6: Final answer
   x = 17,121.66