Finding the Fourth Proportional to 6,288.74, 8,678.04 and 3,456.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,288.74 : 8,678.04 = 3,456.05 : x
2. Step 2: Convert to fraction form
   6,288.74/8,678.04 = 3,456.05/x
3. Step 3: Cross multiply
   6,288.74x = 8,678.04 × 3,456.05
4. Step 4: Simplify right side
   6,288.74x = 29,991,731.50
5. Step 5: Solve for x
   x = 29,991,731.50/6,288.74
6. Step 6: Final answer
   x = 4,769.12