Finding the Fourth Proportional to 8,659.30, 12,965.48 and 4,490.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,659.30 : 12,965.48 = 4,490.56 : x
2. Step 2: Convert to fraction form
   8,659.30/12,965.48 = 4,490.56/x
3. Step 3: Cross multiply
   8,659.30x = 12,965.48 × 4,490.56
4. Step 4: Simplify right side
   8,659.30x = 58,222,309.51
5. Step 5: Solve for x
   x = 58,222,309.51/8,659.30
6. Step 6: Final answer
   x = 6,723.68