Finding the Fourth Proportional to 8,559.81, 12,837.69 and 3,012.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.81 : 12,837.69 = 3,012.12 : x
2. Step 2: Convert to fraction form
   8,559.81/12,837.69 = 3,012.12/x
3. Step 3: Cross multiply
   8,559.81x = 12,837.69 × 3,012.12
4. Step 4: Simplify right side
   8,559.81x = 38,668,662.80
5. Step 5: Solve for x
   x = 38,668,662.80/8,559.81
6. Step 6: Final answer
   x = 4,517.47