Finding the Fourth Proportional to 870,870.80, 1,201,718.76 and 488,810

Step by Step Solution

1. Step 1: Write the proportion equation
   870,870.80 : 1,201,718.76 = 488,810 : x
2. Step 2: Convert to fraction form
   870,870.80/1,201,718.76 = 488,810/x
3. Step 3: Cross multiply
   870,870.80x = 1,201,718.76 × 488,810
4. Step 4: Simplify right side
   870,870.80x = 587,412,147,075.60
5. Step 5: Solve for x
   x = 587,412,147,075.60/870,870.80
6. Step 6: Final answer
   x = 674,511.24