Finding the Fourth Proportional to 12,658.50, 17,469.09 and 7,069.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658.50 : 17,469.09 = 7,069.86 : x
2. Step 2: Convert to fraction form
   12,658.50/17,469.09 = 7,069.86/x
3. Step 3: Cross multiply
   12,658.50x = 17,469.09 × 7,069.86
4. Step 4: Simplify right side
   12,658.50x = 123,504,020.63
5. Step 5: Solve for x
   x = 123,504,020.63/12,658.50
6. Step 6: Final answer
   x = 9,756.61