Finding the Fourth Proportional to 3,948.42, 5,913.62 and 3,386.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.42 : 5,913.62 = 3,386.82 : x
2. Step 2: Convert to fraction form
   3,948.42/5,913.62 = 3,386.82/x
3. Step 3: Cross multiply
   3,948.42x = 5,913.62 × 3,386.82
4. Step 4: Simplify right side
   3,948.42x = 20,028,366.49
5. Step 5: Solve for x
   x = 20,028,366.49/3,948.42
6. Step 6: Final answer
   x = 5,072.50