Finding the Fourth Proportional to 6,407.87, 8,843.61 and 3,890.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,407.87 : 8,843.61 = 3,890.62 : x
2. Step 2: Convert to fraction form
   6,407.87/8,843.61 = 3,890.62/x
3. Step 3: Cross multiply
   6,407.87x = 8,843.61 × 3,890.62
4. Step 4: Simplify right side
   6,407.87x = 34,407,151.58
5. Step 5: Solve for x
   x = 34,407,151.58/6,407.87
6. Step 6: Final answer
   x = 5,369.52