Finding the Fourth Proportional to 6,870.98, 10,306.48 and 3,947.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.98 : 10,306.48 = 3,947.42 : x
2. Step 2: Convert to fraction form
   6,870.98/10,306.48 = 3,947.42/x
3. Step 3: Cross multiply
   6,870.98x = 10,306.48 × 3,947.42
4. Step 4: Simplify right side
   6,870.98x = 40,684,005.28
5. Step 5: Solve for x
   x = 40,684,005.28/6,870.98
6. Step 6: Final answer
   x = 5,921.14