Finding the Fourth Proportional to 12,280.50, 18,420.78 and 3,046.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.50 : 18,420.78 = 3,046.50 : x
2. Step 2: Convert to fraction form
   12,280.50/18,420.78 = 3,046.50/x
3. Step 3: Cross multiply
   12,280.50x = 18,420.78 × 3,046.50
4. Step 4: Simplify right side
   12,280.50x = 56,118,906.27
5. Step 5: Solve for x
   x = 56,118,906.27/12,280.50
6. Step 6: Final answer
   x = 4,569.76