Finding the Fourth Proportional to 6,071.96, 8,379.62 and 3,420.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,071.96 : 8,379.62 = 3,420.20 : x
2. Step 2: Convert to fraction form
   6,071.96/8,379.62 = 3,420.20/x
3. Step 3: Cross multiply
   6,071.96x = 8,379.62 × 3,420.20
4. Step 4: Simplify right side
   6,071.96x = 28,659,976.32
5. Step 5: Solve for x
   x = 28,659,976.32/6,071.96
6. Step 6: Final answer
   x = 4,720.05