Finding the Fourth Proportional to 16,986.05, 23,443.52 and 9,912.45

Step by Step Solution

1. Step 1: Write the proportion equation
   16,986.05 : 23,443.52 = 9,912.45 : x
2. Step 2: Convert to fraction form
   16,986.05/23,443.52 = 9,912.45/x
3. Step 3: Cross multiply
   16,986.05x = 23,443.52 × 9,912.45
4. Step 4: Simplify right side
   16,986.05x = 232,382,719.82
5. Step 5: Solve for x
   x = 232,382,719.82/16,986.05
6. Step 6: Final answer
   x = 13,680.80