Finding the Fourth Proportional to 20,185.99, 27,869.58 and 13,019.47

Step by Step Solution

1. Step 1: Write the proportion equation
   20,185.99 : 27,869.58 = 13,019.47 : x
2. Step 2: Convert to fraction form
   20,185.99/27,869.58 = 13,019.47/x
3. Step 3: Cross multiply
   20,185.99x = 27,869.58 × 13,019.47
4. Step 4: Simplify right side
   20,185.99x = 362,847,091.05
5. Step 5: Solve for x
   x = 362,847,091.05/20,185.99
6. Step 6: Final answer
   x = 17,975.20