Finding the Fourth Proportional to 892,308, 1,231,404.48 and 489,900

Step by Step Solution

1. Step 1: Write the proportion equation
   892,308 : 1,231,404.48 = 489,900 : x
2. Step 2: Convert to fraction form
   892,308/1,231,404.48 = 489,900/x
3. Step 3: Cross multiply
   892,308x = 1,231,404.48 × 489,900
4. Step 4: Simplify right side
   892,308x = 603,265,054,752
5. Step 5: Solve for x
   x = 603,265,054,752/892,308
6. Step 6: Final answer
   x = 676,072.67