Finding the Fourth Proportional to 6,870.69, 9,481.17 and 3,887.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.69 : 9,481.17 = 3,887.12 : x
2. Step 2: Convert to fraction form
   6,870.69/9,481.17 = 3,887.12/x
3. Step 3: Cross multiply
   6,870.69x = 9,481.17 × 3,887.12
4. Step 4: Simplify right side
   6,870.69x = 36,854,445.53
5. Step 5: Solve for x
   x = 36,854,445.53/6,870.69
6. Step 6: Final answer
   x = 5,364.01