Finding the Fourth Proportional to 6,870.38, 9,481.12 and 3,886.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.38 : 9,481.12 = 3,886.15 : x
2. Step 2: Convert to fraction form
   6,870.38/9,481.12 = 3,886.15/x
3. Step 3: Cross multiply
   6,870.38x = 9,481.12 × 3,886.15
4. Step 4: Simplify right side
   6,870.38x = 36,844,997.37
5. Step 5: Solve for x
   x = 36,844,997.37/6,870.38
6. Step 6: Final answer
   x = 5,362.88