Finding the Fourth Proportional to 18,705.33, 25,789.59 and 13,242.69

Step by Step Solution

1. Step 1: Write the proportion equation
   18,705.33 : 25,789.59 = 13,242.69 : x
2. Step 2: Convert to fraction form
   18,705.33/25,789.59 = 13,242.69/x
3. Step 3: Cross multiply
   18,705.33x = 25,789.59 × 13,242.69
4. Step 4: Simplify right side
   18,705.33x = 341,523,545.60
5. Step 5: Solve for x
   x = 341,523,545.60/18,705.33
6. Step 6: Final answer
   x = 18,258.09