Finding the Fourth Proportional to 7,288.86, 10,932.60 and 3,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,288.86 : 10,932.60 = 3,128.10 : x
2. Step 2: Convert to fraction form
   7,288.86/10,932.60 = 3,128.10/x
3. Step 3: Cross multiply
   7,288.86x = 10,932.60 × 3,128.10
4. Step 4: Simplify right side
   7,288.86x = 34,198,266.06
5. Step 5: Solve for x
   x = 34,198,266.06/7,288.86
6. Step 6: Final answer
   x = 4,691.85