Finding the Fourth Proportional to 6,387.70, 8,815.82 and 3,869.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,387.70 : 8,815.82 = 3,869.34 : x
2. Step 2: Convert to fraction form
   6,387.70/8,815.82 = 3,869.34/x
3. Step 3: Cross multiply
   6,387.70x = 8,815.82 × 3,869.34
4. Step 4: Simplify right side
   6,387.70x = 34,111,404.96
5. Step 5: Solve for x
   x = 34,111,404.96/6,387.70
6. Step 6: Final answer
   x = 5,340.17