Finding the Fourth Proportional to 12,758.50, 17,608.35 and 7,169.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,758.50 : 17,608.35 = 7,169.50 : x
2. Step 2: Convert to fraction form
   12,758.50/17,608.35 = 7,169.50/x
3. Step 3: Cross multiply
   12,758.50x = 17,608.35 × 7,169.50
4. Step 4: Simplify right side
   12,758.50x = 126,243,065.33
5. Step 5: Solve for x
   x = 126,243,065.33/12,758.50
6. Step 6: Final answer
   x = 9,894.82