Finding the Fourth Proportional to 8,542.05, 12,812.56 and 3,279.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,542.05 : 12,812.56 = 3,279.58 : x
2. Step 2: Convert to fraction form
   8,542.05/12,812.56 = 3,279.58/x
3. Step 3: Cross multiply
   8,542.05x = 12,812.56 × 3,279.58
4. Step 4: Simplify right side
   8,542.05x = 42,019,815.52
5. Step 5: Solve for x
   x = 42,019,815.52/8,542.05
6. Step 6: Final answer
   x = 4,919.17