Finding the Fourth Proportional to 498,660, 688,200.60 and 297,456

Step by Step Solution

1. Step 1: Write the proportion equation
   498,660 : 688,200.60 = 297,456 : x
2. Step 2: Convert to fraction form
   498,660/688,200.60 = 297,456/x
3. Step 3: Cross multiply
   498,660x = 688,200.60 × 297,456
4. Step 4: Simplify right side
   498,660x = 204,709,397,673.60
5. Step 5: Solve for x
   x = 204,709,397,673.60/498,660
6. Step 6: Final answer
   x = 410,518.99