Finding the Fourth Proportional to 10,998.97, 16,500.20 and 3,978.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,998.97 : 16,500.20 = 3,978.26 : x
2. Step 2: Convert to fraction form
   10,998.97/16,500.20 = 3,978.26/x
3. Step 3: Cross multiply
   10,998.97x = 16,500.20 × 3,978.26
4. Step 4: Simplify right side
   10,998.97x = 65,642,107.01
5. Step 5: Solve for x
   x = 65,642,107.01/10,998.97
6. Step 6: Final answer
   x = 5,968.02