Finding the Fourth Proportional to 6,072.56, 8,380.32 and 3,420.08

Step by Step Solution

1. Step 1: Write the proportion equation
   6,072.56 : 8,380.32 = 3,420.08 : x
2. Step 2: Convert to fraction form
   6,072.56/8,380.32 = 3,420.08/x
3. Step 3: Cross multiply
   6,072.56x = 8,380.32 × 3,420.08
4. Step 4: Simplify right side
   6,072.56x = 28,661,364.83
5. Step 5: Solve for x
   x = 28,661,364.83/6,072.56
6. Step 6: Final answer
   x = 4,719.82