Finding the Fourth Proportional to 16,940, 23,377.15 and 9,386.35

Step by Step Solution

1. Step 1: Write the proportion equation
   16,940 : 23,377.15 = 9,386.35 : x
2. Step 2: Convert to fraction form
   16,940/23,377.15 = 9,386.35/x
3. Step 3: Cross multiply
   16,940x = 23,377.15 × 9,386.35
4. Step 4: Simplify right side
   16,940x = 219,426,111.90
5. Step 5: Solve for x
   x = 219,426,111.90/16,940
6. Step 6: Final answer
   x = 12,953.14