Finding the Fourth Proportional to 276,667.28, 380,996.85 and 240,352.15

Step by Step Solution

1. Step 1: Write the proportion equation
   276,667.28 : 380,996.85 = 240,352.15 : x
2. Step 2: Convert to fraction form
   276,667.28/380,996.85 = 240,352.15/x
3. Step 3: Cross multiply
   276,667.28x = 380,996.85 × 240,352.15
4. Step 4: Simplify right side
   276,667.28x = 91,573,412,040.73
5. Step 5: Solve for x
   x = 91,573,412,040.73/276,667.28
6. Step 6: Final answer
   x = 330,987.50