Finding the Fourth Proportional to 7,685.75, 10,604.46 and 5,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,685.75 : 10,604.46 = 5,128.48 : x
2. Step 2: Convert to fraction form
   7,685.75/10,604.46 = 5,128.48/x
3. Step 3: Cross multiply
   7,685.75x = 10,604.46 × 5,128.48
4. Step 4: Simplify right side
   7,685.75x = 54,384,735.38
5. Step 5: Solve for x
   x = 54,384,735.38/7,685.75
6. Step 6: Final answer
   x = 7,076.05