Finding the Fourth Proportional to 10,908.12, 16,360.56 and 3,981

Step by Step Solution

1. Step 1: Write the proportion equation
   10,908.12 : 16,360.56 = 3,981 : x
2. Step 2: Convert to fraction form
   10,908.12/16,360.56 = 3,981/x
3. Step 3: Cross multiply
   10,908.12x = 16,360.56 × 3,981
4. Step 4: Simplify right side
   10,908.12x = 65,131,389.36
5. Step 5: Solve for x
   x = 65,131,389.36/10,908.12
6. Step 6: Final answer
   x = 5,970.91