Finding the Fourth Proportional to 8,649.06, 12,978.84 and 3,454.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,649.06 : 12,978.84 = 3,454.50 : x
2. Step 2: Convert to fraction form
   8,649.06/12,978.84 = 3,454.50/x
3. Step 3: Cross multiply
   8,649.06x = 12,978.84 × 3,454.50
4. Step 4: Simplify right side
   8,649.06x = 44,835,402.78
5. Step 5: Solve for x
   x = 44,835,402.78/8,649.06
6. Step 6: Final answer
   x = 5,183.85