Finding the Fourth Proportional to 12,290.42, 16,960.89 and 6,985.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.42 : 16,960.89 = 6,985.27 : x
2. Step 2: Convert to fraction form
   12,290.42/16,960.89 = 6,985.27/x
3. Step 3: Cross multiply
   12,290.42x = 16,960.89 × 6,985.27
4. Step 4: Simplify right side
   12,290.42x = 118,476,443.49
5. Step 5: Solve for x
   x = 118,476,443.49/12,290.42
6. Step 6: Final answer
   x = 9,639.74