Finding the Fourth Proportional to 6,185.20, 8,535.42 and 3,390.70

Step by Step Solution

1. Step 1: Write the proportion equation
   6,185.20 : 8,535.42 = 3,390.70 : x
2. Step 2: Convert to fraction form
   6,185.20/8,535.42 = 3,390.70/x
3. Step 3: Cross multiply
   6,185.20x = 8,535.42 × 3,390.70
4. Step 4: Simplify right side
   6,185.20x = 28,941,048.59
5. Step 5: Solve for x
   x = 28,941,048.59/6,185.20
6. Step 6: Final answer
   x = 4,679.08