Finding the Fourth Proportional to 16,680.21, 23,018.49 and 9,126.45

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.21 : 23,018.49 = 9,126.45 : x
2. Step 2: Convert to fraction form
   16,680.21/23,018.49 = 9,126.45/x
3. Step 3: Cross multiply
   16,680.21x = 23,018.49 × 9,126.45
4. Step 4: Simplify right side
   16,680.21x = 210,077,178.42
5. Step 5: Solve for x
   x = 210,077,178.42/16,680.21
6. Step 6: Final answer
   x = 12,594.40