Finding the Fourth Proportional to 30,786.93, 42,483.83 and 18,209.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,786.93 : 42,483.83 = 18,209.25 : x
2. Step 2: Convert to fraction form
   30,786.93/42,483.83 = 18,209.25/x
3. Step 3: Cross multiply
   30,786.93x = 42,483.83 × 18,209.25
4. Step 4: Simplify right side
   30,786.93x = 773,598,590.38
5. Step 5: Solve for x
   x = 773,598,590.38/30,786.93
6. Step 6: Final answer
   x = 25,127.50