Finding the Fourth Proportional to 870,009.10, 1,304,591.72 and 510,297.48

Step by Step Solution

1. Step 1: Write the proportion equation
   870,009.10 : 1,304,591.72 = 510,297.48 : x
2. Step 2: Convert to fraction form
   870,009.10/1,304,591.72 = 510,297.48/x
3. Step 3: Cross multiply
   870,009.10x = 1,304,591.72 × 510,297.48
4. Step 4: Simplify right side
   870,009.10x = 665,729,867,144.87
5. Step 5: Solve for x
   x = 665,729,867,144.87/870,009.10
6. Step 6: Final answer
   x = 765,198.74