Finding the Fourth Proportional to 10,979.98, 16,478.54 and 4,410.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,979.98 : 16,478.54 = 4,410.47 : x
2. Step 2: Convert to fraction form
   10,979.98/16,478.54 = 4,410.47/x
3. Step 3: Cross multiply
   10,979.98x = 16,478.54 × 4,410.47
4. Step 4: Simplify right side
   10,979.98x = 72,678,106.31
5. Step 5: Solve for x
   x = 72,678,106.31/10,979.98
6. Step 6: Final answer
   x = 6,619.15