Finding the Fourth Proportional to 870,074.79, 1,200,711.41 and 488,109.77

Step by Step Solution

1. Step 1: Write the proportion equation
   870,074.79 : 1,200,711.41 = 488,109.77 : x
2. Step 2: Convert to fraction form
   870,074.79/1,200,711.41 = 488,109.77/x
3. Step 3: Cross multiply
   870,074.79x = 1,200,711.41 × 488,109.77
4. Step 4: Simplify right side
   870,074.79x = 586,078,972,123.83
5. Step 5: Solve for x
   x = 586,078,972,123.83/870,074.79
6. Step 6: Final answer
   x = 673,596.09