Finding the Fourth Proportional to 209,067.94, 288,514.47 and 123,030.28

Step by Step Solution

1. Step 1: Write the proportion equation
   209,067.94 : 288,514.47 = 123,030.28 : x
2. Step 2: Convert to fraction form
   209,067.94/288,514.47 = 123,030.28/x
3. Step 3: Cross multiply
   209,067.94x = 288,514.47 × 123,030.28
4. Step 4: Simplify right side
   209,067.94x = 35,496,016,028.15
5. Step 5: Solve for x
   x = 35,496,016,028.15/209,067.94
6. Step 6: Final answer
   x = 169,782.21