Finding the Fourth Proportional to 204,667.79, 307,034.49 and 86,356.56

Step by Step Solution

1. Step 1: Write the proportion equation
   204,667.79 : 307,034.49 = 86,356.56 : x
2. Step 2: Convert to fraction form
   204,667.79/307,034.49 = 86,356.56/x
3. Step 3: Cross multiply
   204,667.79x = 307,034.49 × 86,356.56
4. Step 4: Simplify right side
   204,667.79x = 26,514,442,357.75
5. Step 5: Solve for x
   x = 26,514,442,357.75/204,667.79
6. Step 6: Final answer
   x = 129,548.68