Finding the Fourth Proportional to 870,870.58, 1,201,735.05 and 488,823.55

Step by Step Solution

1. Step 1: Write the proportion equation
   870,870.58 : 1,201,735.05 = 488,823.55 : x
2. Step 2: Convert to fraction form
   870,870.58/1,201,735.05 = 488,823.55/x
3. Step 3: Cross multiply
   870,870.58x = 1,201,735.05 × 488,823.55
4. Step 4: Simplify right side
   870,870.58x = 587,436,393,300.43
5. Step 5: Solve for x
   x = 587,436,393,300.43/870,870.58
6. Step 6: Final answer
   x = 674,539.26