Finding the Fourth Proportional to 12,983.89, 17,911.90 and 7,946.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,983.89 : 17,911.90 = 7,946.09 : x
2. Step 2: Convert to fraction form
   12,983.89/17,911.90 = 7,946.09/x
3. Step 3: Cross multiply
   12,983.89x = 17,911.90 × 7,946.09
4. Step 4: Simplify right side
   12,983.89x = 142,329,529.74
5. Step 5: Solve for x
   x = 142,329,529.74/12,983.89
6. Step 6: Final answer
   x = 10,962.01