Finding the Fourth Proportional to 16,886.88, 23,290.20 and 12,901.68

Step by Step Solution

1. Step 1: Write the proportion equation
   16,886.88 : 23,290.20 = 12,901.68 : x
2. Step 2: Convert to fraction form
   16,886.88/23,290.20 = 12,901.68/x
3. Step 3: Cross multiply
   16,886.88x = 23,290.20 × 12,901.68
4. Step 4: Simplify right side
   16,886.88x = 300,482,707.54
5. Step 5: Solve for x
   x = 300,482,707.54/16,886.88
6. Step 6: Final answer
   x = 17,793.86