Finding the Fourth Proportional to 8,570.10, 12,856.15 and 2,727.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.10 : 12,856.15 = 2,727.30 : x
2. Step 2: Convert to fraction form
   8,570.10/12,856.15 = 2,727.30/x
3. Step 3: Cross multiply
   8,570.10x = 12,856.15 × 2,727.30
4. Step 4: Simplify right side
   8,570.10x = 35,062,577.90
5. Step 5: Solve for x
   x = 35,062,577.90/8,570.10
6. Step 6: Final answer
   x = 4,091.27