Finding the Fourth Proportional to 7,078.50, 10,620.45 and 3,380.58

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.50 : 10,620.45 = 3,380.58 : x
2. Step 2: Convert to fraction form
   7,078.50/10,620.45 = 3,380.58/x
3. Step 3: Cross multiply
   7,078.50x = 10,620.45 × 3,380.58
4. Step 4: Simplify right side
   7,078.50x = 35,903,280.86
5. Step 5: Solve for x
   x = 35,903,280.86/7,078.50
6. Step 6: Final answer
   x = 5,072.16