Finding the Fourth Proportional to 657,786.82, 907,745.82 and 355,980.82

Step by Step Solution

1. Step 1: Write the proportion equation
   657,786.82 : 907,745.82 = 355,980.82 : x
2. Step 2: Convert to fraction form
   657,786.82/907,745.82 = 355,980.82/x
3. Step 3: Cross multiply
   657,786.82x = 907,745.82 × 355,980.82
4. Step 4: Simplify right side
   657,786.82x = 323,140,095,036.54
5. Step 5: Solve for x
   x = 323,140,095,036.54/657,786.82
6. Step 6: Final answer
   x = 491,253.53