Finding the Fourth Proportional to 16,478.50, 22,743.49 and 12,886.34

Step by Step Solution

1. Step 1: Write the proportion equation
   16,478.50 : 22,743.49 = 12,886.34 : x
2. Step 2: Convert to fraction form
   16,478.50/22,743.49 = 12,886.34/x
3. Step 3: Cross multiply
   16,478.50x = 22,743.49 × 12,886.34
4. Step 4: Simplify right side
   16,478.50x = 293,080,344.93
5. Step 5: Solve for x
   x = 293,080,344.93/16,478.50
6. Step 6: Final answer
   x = 17,785.62