Finding the Fourth Proportional to 10,990.87, 16,476.34 and 3,969.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.87 : 16,476.34 = 3,969.22 : x
2. Step 2: Convert to fraction form
   10,990.87/16,476.34 = 3,969.22/x
3. Step 3: Cross multiply
   10,990.87x = 16,476.34 × 3,969.22
4. Step 4: Simplify right side
   10,990.87x = 65,398,218.25
5. Step 5: Solve for x
   x = 65,398,218.25/10,990.87
6. Step 6: Final answer
   x = 5,950.23