Finding the Fourth Proportional to 8,469.63, 12,705.17 and 2,920.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,469.63 : 12,705.17 = 2,920.73 : x
2. Step 2: Convert to fraction form
   8,469.63/12,705.17 = 2,920.73/x
3. Step 3: Cross multiply
   8,469.63x = 12,705.17 × 2,920.73
4. Step 4: Simplify right side
   8,469.63x = 37,108,293.04
5. Step 5: Solve for x
   x = 37,108,293.04/8,469.63
6. Step 6: Final answer
   x = 4,381.34