Finding the Fourth Proportional to 23,089.92, 31,864.32 and 12,479.76

Step by Step Solution

1. Step 1: Write the proportion equation
   23,089.92 : 31,864.32 = 12,479.76 : x
2. Step 2: Convert to fraction form
   23,089.92/31,864.32 = 12,479.76/x
3. Step 3: Cross multiply
   23,089.92x = 31,864.32 × 12,479.76
4. Step 4: Simplify right side
   23,089.92x = 397,659,066.16
5. Step 5: Solve for x
   x = 397,659,066.16/23,089.92
6. Step 6: Final answer
   x = 17,222.19