Finding the Fourth Proportional to 8,648.43, 12,976.44 and 3,385.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.43 : 12,976.44 = 3,385.05 : x
2. Step 2: Convert to fraction form
   8,648.43/12,976.44 = 3,385.05/x
3. Step 3: Cross multiply
   8,648.43x = 12,976.44 × 3,385.05
4. Step 4: Simplify right side
   8,648.43x = 43,925,898.22
5. Step 5: Solve for x
   x = 43,925,898.22/8,648.43
6. Step 6: Final answer
   x = 5,079.06