Finding the Fourth Proportional to 10,722.39, 16,078.10 and 4,480.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,722.39 : 16,078.10 = 4,480.70 : x
2. Step 2: Convert to fraction form
   10,722.39/16,078.10 = 4,480.70/x
3. Step 3: Cross multiply
   10,722.39x = 16,078.10 × 4,480.70
4. Step 4: Simplify right side
   10,722.39x = 72,041,039.88
5. Step 5: Solve for x
   x = 72,041,039.88/10,722.39
6. Step 6: Final answer
   x = 6,718.75