Finding the Fourth Proportional to 8,429.48, 12,645.59 and 3,164.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.48 : 12,645.59 = 3,164.90 : x
2. Step 2: Convert to fraction form
   8,429.48/12,645.59 = 3,164.90/x
3. Step 3: Cross multiply
   8,429.48x = 12,645.59 × 3,164.90
4. Step 4: Simplify right side
   8,429.48x = 40,022,043.58
5. Step 5: Solve for x
   x = 40,022,043.58/8,429.48
6. Step 6: Final answer
   x = 4,747.87