Finding the Fourth Proportional to 3,985.78, 5,976.18 and 3,470.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.78 : 5,976.18 = 3,470.62 : x
2. Step 2: Convert to fraction form
   3,985.78/5,976.18 = 3,470.62/x
3. Step 3: Cross multiply
   3,985.78x = 5,976.18 × 3,470.62
4. Step 4: Simplify right side
   3,985.78x = 20,741,049.83
5. Step 5: Solve for x
   x = 20,741,049.83/3,985.78
6. Step 6: Final answer
   x = 5,203.76