Finding the Fourth Proportional to 10,678.78, 16,011.54 and 4,443.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,678.78 : 16,011.54 = 4,443.16 : x
2. Step 2: Convert to fraction form
   10,678.78/16,011.54 = 4,443.16/x
3. Step 3: Cross multiply
   10,678.78x = 16,011.54 × 4,443.16
4. Step 4: Simplify right side
   10,678.78x = 71,141,834.07
5. Step 5: Solve for x
   x = 71,141,834.07/10,678.78
6. Step 6: Final answer
   x = 6,661.98