Finding the Fourth Proportional to 8,356.50, 12,529.89 and 2,806.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,356.50 : 12,529.89 = 2,806.79 : x
2. Step 2: Convert to fraction form
   8,356.50/12,529.89 = 2,806.79/x
3. Step 3: Cross multiply
   8,356.50x = 12,529.89 × 2,806.79
4. Step 4: Simplify right side
   8,356.50x = 35,168,707.30
5. Step 5: Solve for x
   x = 35,168,707.30/8,356.50
6. Step 6: Final answer
   x = 4,208.55