Finding the Fourth Proportional to 6,128.28, 9,196.50 and 3,938.58

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.28 : 9,196.50 = 3,938.58 : x
2. Step 2: Convert to fraction form
   6,128.28/9,196.50 = 3,938.58/x
3. Step 3: Cross multiply
   6,128.28x = 9,196.50 × 3,938.58
4. Step 4: Simplify right side
   6,128.28x = 36,221,150.97
5. Step 5: Solve for x
   x = 36,221,150.97/6,128.28
6. Step 6: Final answer
   x = 5,910.49