Finding the Fourth Proportional to 5,108.84, 7,648.86 and 3,938.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,108.84 : 7,648.86 = 3,938.12 : x
2. Step 2: Convert to fraction form
   5,108.84/7,648.86 = 3,938.12/x
3. Step 3: Cross multiply
   5,108.84x = 7,648.86 × 3,938.12
4. Step 4: Simplify right side
   5,108.84x = 30,122,128.54
5. Step 5: Solve for x
   x = 30,122,128.54/5,108.84
6. Step 6: Final answer
   x = 5,896.08