Finding the Fourth Proportional to 5,155.71, 7,722.69 and 4,276.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,155.71 : 7,722.69 = 4,276.05 : x
2. Step 2: Convert to fraction form
   5,155.71/7,722.69 = 4,276.05/x
3. Step 3: Cross multiply
   5,155.71x = 7,722.69 × 4,276.05
4. Step 4: Simplify right side
   5,155.71x = 33,022,608.57
5. Step 5: Solve for x
   x = 33,022,608.57/5,155.71
6. Step 6: Final answer
   x = 6,405.06