Finding the Fourth Proportional to 16,939.40, 23,377.50 and 9,386.06

Step by Step Solution

1. Step 1: Write the proportion equation
   16,939.40 : 23,377.50 = 9,386.06 : x
2. Step 2: Convert to fraction form
   16,939.40/23,377.50 = 9,386.06/x
3. Step 3: Cross multiply
   16,939.40x = 23,377.50 × 9,386.06
4. Step 4: Simplify right side
   16,939.40x = 219,422,500.76
5. Step 5: Solve for x
   x = 219,422,500.76/16,939.40
6. Step 6: Final answer
   x = 12,953.38