Finding the Fourth Proportional to 10,719.94, 16,077 and 4,478.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,719.94 : 16,077 = 4,478.64 : x
2. Step 2: Convert to fraction form
   10,719.94/16,077 = 4,478.64/x
3. Step 3: Cross multiply
   10,719.94x = 16,077 × 4,478.64
4. Step 4: Simplify right side
   10,719.94x = 72,003,155.57
5. Step 5: Solve for x
   x = 72,003,155.57/10,719.94
6. Step 6: Final answer
   x = 6,716.75