Finding the Fourth Proportional to 338,954.72, 508,429.82 and 86,233

Step by Step Solution

1. Step 1: Write the proportion equation
   338,954.72 : 508,429.82 = 86,233 : x
2. Step 2: Convert to fraction form
   338,954.72/508,429.82 = 86,233/x
3. Step 3: Cross multiply
   338,954.72x = 508,429.82 × 86,233
4. Step 4: Simplify right side
   338,954.72x = 43,843,428,668.06
5. Step 5: Solve for x
   x = 43,843,428,668.06/338,954.72
6. Step 6: Final answer
   x = 129,348.93