Finding the Fourth Proportional to 870,951.90, 1,201,882.78 and 488,994.78

Step by Step Solution

1. Step 1: Write the proportion equation
   870,951.90 : 1,201,882.78 = 488,994.78 : x
2. Step 2: Convert to fraction form
   870,951.90/1,201,882.78 = 488,994.78/x
3. Step 3: Cross multiply
   870,951.90x = 1,201,882.78 × 488,994.78
4. Step 4: Simplify right side
   870,951.90x = 587,714,405,591.89
5. Step 5: Solve for x
   x = 587,714,405,591.89/870,951.90
6. Step 6: Final answer
   x = 674,795.48