Finding the Fourth Proportional to 1,173,456, 1,619,370.72 and 636,912

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,456 : 1,619,370.72 = 636,912 : x
2. Step 2: Convert to fraction form
   1,173,456/1,619,370.72 = 636,912/x
3. Step 3: Cross multiply
   1,173,456x = 1,619,370.72 × 636,912
4. Step 4: Simplify right side
   1,173,456x = 1,031,396,644,016.64
5. Step 5: Solve for x
   x = 1,031,396,644,016.64/1,173,456
6. Step 6: Final answer
   x = 878,939.34