Finding the Fourth Proportional to 23,089.32, 31,863.15 and 12,478.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,089.32 : 31,863.15 = 12,478.92 : x
2. Step 2: Convert to fraction form
   23,089.32/31,863.15 = 12,478.92/x
3. Step 3: Cross multiply
   23,089.32x = 31,863.15 × 12,478.92
4. Step 4: Simplify right side
   23,089.32x = 397,617,699.80
5. Step 5: Solve for x
   x = 397,617,699.80/23,089.32
6. Step 6: Final answer
   x = 17,220.85