Finding the Fourth Proportional to 6,289.47, 8,678.94 and 3,456.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,289.47 : 8,678.94 = 3,456.69 : x
2. Step 2: Convert to fraction form
   6,289.47/8,678.94 = 3,456.69/x
3. Step 3: Cross multiply
   6,289.47x = 8,678.94 × 3,456.69
4. Step 4: Simplify right side
   6,289.47x = 30,000,405.11
5. Step 5: Solve for x
   x = 30,000,405.11/6,289.47
6. Step 6: Final answer
   x = 4,769.94