Finding the Fourth Proportional to 12,471.75, 17,209.46 and 7,628.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,471.75 : 17,209.46 = 7,628.91 : x
2. Step 2: Convert to fraction form
   12,471.75/17,209.46 = 7,628.91/x
3. Step 3: Cross multiply
   12,471.75x = 17,209.46 × 7,628.91
4. Step 4: Simplify right side
   12,471.75x = 131,289,383.34
5. Step 5: Solve for x
   x = 131,289,383.34/12,471.75
6. Step 6: Final answer
   x = 10,526.94