Finding the Fourth Proportional to 6,870.18, 9,481.38 and 3,886.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.18 : 9,481.38 = 3,886.05 : x
2. Step 2: Convert to fraction form
   6,870.18/9,481.38 = 3,886.05/x
3. Step 3: Cross multiply
   6,870.18x = 9,481.38 × 3,886.05
4. Step 4: Simplify right side
   6,870.18x = 36,845,116.75
5. Step 5: Solve for x
   x = 36,845,116.75/6,870.18
6. Step 6: Final answer
   x = 5,363.05