Finding the Fourth Proportional to 6,870.12, 9,481.17 and 3,886.25

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.12 : 9,481.17 = 3,886.25 : x
2. Step 2: Convert to fraction form
   6,870.12/9,481.17 = 3,886.25/x
3. Step 3: Cross multiply
   6,870.12x = 9,481.17 × 3,886.25
4. Step 4: Simplify right side
   6,870.12x = 36,846,149.51
5. Step 5: Solve for x
   x = 36,846,149.51/6,870.12
6. Step 6: Final answer
   x = 5,363.25