Finding the Fourth Proportional to 3,047.10, 4,570.20 and 856.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,047.10 : 4,570.20 = 856.08 : x
2. Step 2: Convert to fraction form
   3,047.10/4,570.20 = 856.08/x
3. Step 3: Cross multiply
   3,047.10x = 4,570.20 × 856.08
4. Step 4: Simplify right side
   3,047.10x = 3,912,456.82
5. Step 5: Solve for x
   x = 3,912,456.82/3,047.10
6. Step 6: Final answer
   x = 1,283.99