Finding the Fourth Proportional to 5,107.56, 7,667.91 and 3,938.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,107.56 : 7,667.91 = 3,938.31 : x
2. Step 2: Convert to fraction form
   5,107.56/7,667.91 = 3,938.31/x
3. Step 3: Cross multiply
   5,107.56x = 7,667.91 × 3,938.31
4. Step 4: Simplify right side
   5,107.56x = 30,198,606.63
5. Step 5: Solve for x
   x = 30,198,606.63/5,107.56
6. Step 6: Final answer
   x = 5,912.53