Finding the Fourth Proportional to 11,019.71, 16,522.38 and 3,998.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,019.71 : 16,522.38 = 3,998.40 : x
2. Step 2: Convert to fraction form
   11,019.71/16,522.38 = 3,998.40/x
3. Step 3: Cross multiply
   11,019.71x = 16,522.38 × 3,998.40
4. Step 4: Simplify right side
   11,019.71x = 66,063,022.23
5. Step 5: Solve for x
   x = 66,063,022.23/11,019.71
6. Step 6: Final answer
   x = 5,994.99