Finding the Fourth Proportional to 16,731.98, 23,090.43 and 9,178.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,731.98 : 23,090.43 = 9,178.69 : x
2. Step 2: Convert to fraction form
   16,731.98/23,090.43 = 9,178.69/x
3. Step 3: Cross multiply
   16,731.98x = 23,090.43 × 9,178.69
4. Step 4: Simplify right side
   16,731.98x = 211,939,983.87
5. Step 5: Solve for x
   x = 211,939,983.87/16,731.98
6. Step 6: Final answer
   x = 12,666.76