Finding the Fourth Proportional to 10,908.36, 16,356.78 and 4,749

Step by Step Solution

1. Step 1: Write the proportion equation
   10,908.36 : 16,356.78 = 4,749 : x
2. Step 2: Convert to fraction form
   10,908.36/16,356.78 = 4,749/x
3. Step 3: Cross multiply
   10,908.36x = 16,356.78 × 4,749
4. Step 4: Simplify right side
   10,908.36x = 77,678,348.22
5. Step 5: Solve for x
   x = 77,678,348.22/10,908.36
6. Step 6: Final answer
   x = 7,120.99