Finding the Fourth Proportional to 12,469.59, 17,207.60 and 7,091.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.59 : 17,207.60 = 7,091.55 : x
2. Step 2: Convert to fraction form
   12,469.59/17,207.60 = 7,091.55/x
3. Step 3: Cross multiply
   12,469.59x = 17,207.60 × 7,091.55
4. Step 4: Simplify right side
   12,469.59x = 122,028,520.32
5. Step 5: Solve for x
   x = 122,028,520.32/12,469.59
6. Step 6: Final answer
   x = 9,786.09