Finding the Fourth Proportional to 8,630.67, 12,948.72 and 3,083.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,630.67 : 12,948.72 = 3,083.90 : x
2. Step 2: Convert to fraction form
   8,630.67/12,948.72 = 3,083.90/x
3. Step 3: Cross multiply
   8,630.67x = 12,948.72 × 3,083.90
4. Step 4: Simplify right side
   8,630.67x = 39,932,492.86
5. Step 5: Solve for x
   x = 39,932,492.86/8,630.67
6. Step 6: Final answer
   x = 4,626.81