Finding the Fourth Proportional to 870,081.83, 1,200,721.12 and 488,116.81

Step by Step Solution

1. Step 1: Write the proportion equation
   870,081.83 : 1,200,721.12 = 488,116.81 : x
2. Step 2: Convert to fraction form
   870,081.83/1,200,721.12 = 488,116.81/x
3. Step 3: Cross multiply
   870,081.83x = 1,200,721.12 × 488,116.81
4. Step 4: Simplify right side
   870,081.83x = 586,092,162,794.03
5. Step 5: Solve for x
   x = 586,092,162,794.03/870,081.83
6. Step 6: Final answer
   x = 673,605.79