Finding the Fourth Proportional to 8,585.15, 12,859.49 and 4,885.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,585.15 : 12,859.49 = 4,885.47 : x
2. Step 2: Convert to fraction form
   8,585.15/12,859.49 = 4,885.47/x
3. Step 3: Cross multiply
   8,585.15x = 12,859.49 × 4,885.47
4. Step 4: Simplify right side
   8,585.15x = 62,824,664.82
5. Step 5: Solve for x
   x = 62,824,664.82/8,585.15
6. Step 6: Final answer
   x = 7,317.83