Finding the Fourth Proportional to 12,825.60, 17,693.97 and 8,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,825.60 : 17,693.97 = 8,520.72 : x
2. Step 2: Convert to fraction form
   12,825.60/17,693.97 = 8,520.72/x
3. Step 3: Cross multiply
   12,825.60x = 17,693.97 × 8,520.72
4. Step 4: Simplify right side
   12,825.60x = 150,765,364.06
5. Step 5: Solve for x
   x = 150,765,364.06/12,825.60
6. Step 6: Final answer
   x = 11,755.03