Finding the Fourth Proportional to 10,990.76, 16,479.50 and 4,319.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.76 : 16,479.50 = 4,319.27 : x
2. Step 2: Convert to fraction form
   10,990.76/16,479.50 = 4,319.27/x
3. Step 3: Cross multiply
   10,990.76x = 16,479.50 × 4,319.27
4. Step 4: Simplify right side
   10,990.76x = 71,179,429.57
5. Step 5: Solve for x
   x = 71,179,429.57/10,990.76
6. Step 6: Final answer
   x = 6,476.30