Finding the Fourth Proportional to 5,615.38, 7,741.02 and 3,931.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,615.38 : 7,741.02 = 3,931.48 : x
2. Step 2: Convert to fraction form
   5,615.38/7,741.02 = 3,931.48/x
3. Step 3: Cross multiply
   5,615.38x = 7,741.02 × 3,931.48
4. Step 4: Simplify right side
   5,615.38x = 30,433,665.31
5. Step 5: Solve for x
   x = 30,433,665.31/5,615.38
6. Step 6: Final answer
   x = 5,419.70