Finding the Fourth Proportional to 8,499.35, 11,728.72 and 4,722.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.35 : 11,728.72 = 4,722.78 : x
2. Step 2: Convert to fraction form
   8,499.35/11,728.72 = 4,722.78/x
3. Step 3: Cross multiply
   8,499.35x = 11,728.72 × 4,722.78
4. Step 4: Simplify right side
   8,499.35x = 55,392,152.43
5. Step 5: Solve for x
   x = 55,392,152.43/8,499.35
6. Step 6: Final answer
   x = 6,517.22