Finding the Fourth Proportional to 7,128.38, 10,683.14 and 5,160.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.38 : 10,683.14 = 5,160.59 : x
2. Step 2: Convert to fraction form
   7,128.38/10,683.14 = 5,160.59/x
3. Step 3: Cross multiply
   7,128.38x = 10,683.14 × 5,160.59
4. Step 4: Simplify right side
   7,128.38x = 55,131,226.23
5. Step 5: Solve for x
   x = 55,131,226.23/7,128.38
6. Step 6: Final answer
   x = 7,734.05