Finding the Fourth Proportional to 218,892.30, 302,067.34 and 123,399.07

Step by Step Solution

1. Step 1: Write the proportion equation
   218,892.30 : 302,067.34 = 123,399.07 : x
2. Step 2: Convert to fraction form
   218,892.30/302,067.34 = 123,399.07/x
3. Step 3: Cross multiply
   218,892.30x = 302,067.34 × 123,399.07
4. Step 4: Simplify right side
   218,892.30x = 37,274,828,833.37
5. Step 5: Solve for x
   x = 37,274,828,833.37/218,892.30
6. Step 6: Final answer
   x = 170,288.44