Finding the Fourth Proportional to 260,667.15, 359,535.15 and 239,226.09

Step by Step Solution

1. Step 1: Write the proportion equation
   260,667.15 : 359,535.15 = 239,226.09 : x
2. Step 2: Convert to fraction form
   260,667.15/359,535.15 = 239,226.09/x
3. Step 3: Cross multiply
   260,667.15x = 359,535.15 × 239,226.09
4. Step 4: Simplify right side
   260,667.15x = 86,010,188,152.06
5. Step 5: Solve for x
   x = 86,010,188,152.06/260,667.15
6. Step 6: Final answer
   x = 329,961.75