Finding the Fourth Proportional to 204,667.59, 307,034.21 and 86,356.35

Step by Step Solution

1. Step 1: Write the proportion equation
   204,667.59 : 307,034.21 = 86,356.35 : x
2. Step 2: Convert to fraction form
   204,667.59/307,034.21 = 86,356.35/x
3. Step 3: Cross multiply
   204,667.59x = 307,034.21 × 86,356.35
4. Step 4: Simplify right side
   204,667.59x = 26,514,353,700.73
5. Step 5: Solve for x
   x = 26,514,353,700.73/204,667.59
6. Step 6: Final answer
   x = 129,548.38