Finding the Fourth Proportional to 16,789.74, 23,170.62 and 9,714.79

Step by Step Solution

1. Step 1: Write the proportion equation
   16,789.74 : 23,170.62 = 9,714.79 : x
2. Step 2: Convert to fraction form
   16,789.74/23,170.62 = 9,714.79/x
3. Step 3: Cross multiply
   16,789.74x = 23,170.62 × 9,714.79
4. Step 4: Simplify right side
   16,789.74x = 225,097,707.47
5. Step 5: Solve for x
   x = 225,097,707.47/16,789.74
6. Step 6: Final answer
   x = 13,406.86