Finding the Fourth Proportional to 10,906.12, 16,357.56 and 3,979

Step by Step Solution

1. Step 1: Write the proportion equation
   10,906.12 : 16,357.56 = 3,979 : x
2. Step 2: Convert to fraction form
   10,906.12/16,357.56 = 3,979/x
3. Step 3: Cross multiply
   10,906.12x = 16,357.56 × 3,979
4. Step 4: Simplify right side
   10,906.12x = 65,086,731.24
5. Step 5: Solve for x
   x = 65,086,731.24/10,906.12
6. Step 6: Final answer
   x = 5,967.91