Finding the Fourth Proportional to 20,626.84, 30,884.83 and 13,089.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,626.84 : 30,884.83 = 13,089.59 : x
2. Step 2: Convert to fraction form
   20,626.84/30,884.83 = 13,089.59/x
3. Step 3: Cross multiply
   20,626.84x = 30,884.83 × 13,089.59
4. Step 4: Simplify right side
   20,626.84x = 404,269,696.47
5. Step 5: Solve for x
   x = 404,269,696.47/20,626.84
6. Step 6: Final answer
   x = 19,599.21