Finding the Fourth Proportional to 10,678.16, 16,012.96 and 3,280.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,678.16 : 16,012.96 = 3,280.03 : x
2. Step 2: Convert to fraction form
   10,678.16/16,012.96 = 3,280.03/x
3. Step 3: Cross multiply
   10,678.16x = 16,012.96 × 3,280.03
4. Step 4: Simplify right side
   10,678.16x = 52,522,940.96
5. Step 5: Solve for x
   x = 52,522,940.96/10,678.16
6. Step 6: Final answer
   x = 4,918.72