Finding the Fourth Proportional to 610,667.28, 842,721.57 and 356,067.68

Step by Step Solution

1. Step 1: Write the proportion equation
   610,667.28 : 842,721.57 = 356,067.68 : x
2. Step 2: Convert to fraction form
   610,667.28/842,721.57 = 356,067.68/x
3. Step 3: Cross multiply
   610,667.28x = 842,721.57 × 356,067.68
4. Step 4: Simplify right side
   610,667.28x = 300,065,910,102.25
5. Step 5: Solve for x
   x = 300,065,910,102.25/610,667.28
6. Step 6: Final answer
   x = 491,373.81