Finding the Fourth Proportional to 657,289, 907,058.82 and 355,483

Step by Step Solution

1. Step 1: Write the proportion equation
   657,289 : 907,058.82 = 355,483 : x
2. Step 2: Convert to fraction form
   657,289/907,058.82 = 355,483/x
3. Step 3: Cross multiply
   657,289x = 907,058.82 × 355,483
4. Step 4: Simplify right side
   657,289x = 322,443,990,510.06
5. Step 5: Solve for x
   x = 322,443,990,510.06/657,289
6. Step 6: Final answer
   x = 490,566.54