Finding the Fourth Proportional to 12,825.50, 17,700 and 7,236.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,825.50 : 17,700 = 7,236.50 : x
2. Step 2: Convert to fraction form
   12,825.50/17,700 = 7,236.50/x
3. Step 3: Cross multiply
   12,825.50x = 17,700 × 7,236.50
4. Step 4: Simplify right side
   12,825.50x = 128,086,050
5. Step 5: Solve for x
   x = 128,086,050/12,825.50
6. Step 6: Final answer
   x = 9,986.83