Finding the Fourth Proportional to 6,072.98, 8,380.63 and 3,420.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,072.98 : 8,380.63 = 3,420.42 : x
2. Step 2: Convert to fraction form
   6,072.98/8,380.63 = 3,420.42/x
3. Step 3: Cross multiply
   6,072.98x = 8,380.63 × 3,420.42
4. Step 4: Simplify right side
   6,072.98x = 28,665,274.46
5. Step 5: Solve for x
   x = 28,665,274.46/6,072.98
6. Step 6: Final answer
   x = 4,720.13