Finding the Fourth Proportional to 7,866.50, 10,855.78 and 4,722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,866.50 : 10,855.78 = 4,722.72 : x
2. Step 2: Convert to fraction form
   7,866.50/10,855.78 = 4,722.72/x
3. Step 3: Cross multiply
   7,866.50x = 10,855.78 × 4,722.72
4. Step 4: Simplify right side
   7,866.50x = 51,268,809.32
5. Step 5: Solve for x
   x = 51,268,809.32/7,866.50
6. Step 6: Final answer
   x = 6,517.36