Finding the Fourth Proportional to 16,979.01, 23,425.77 and 9,900.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,979.01 : 23,425.77 = 9,900.42 : x
2. Step 2: Convert to fraction form
   16,979.01/23,425.77 = 9,900.42/x
3. Step 3: Cross multiply
   16,979.01x = 23,425.77 × 9,900.42
4. Step 4: Simplify right side
   16,979.01x = 231,924,961.82
5. Step 5: Solve for x
   x = 231,924,961.82/16,979.01
6. Step 6: Final answer
   x = 13,659.51