Finding the Fourth Proportional to 16,939.87, 23,376.72 and 9,386.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,939.87 : 23,376.72 = 9,386.05 : x
2. Step 2: Convert to fraction form
   16,939.87/23,376.72 = 9,386.05/x
3. Step 3: Cross multiply
   16,939.87x = 23,376.72 × 9,386.05
4. Step 4: Simplify right side
   16,939.87x = 219,415,062.76
5. Step 5: Solve for x
   x = 219,415,062.76/16,939.87
6. Step 6: Final answer
   x = 12,952.58