Finding the Fourth Proportional to 902,443.83, 1,245,371.40 and 494,571.30

Step by Step Solution

1. Step 1: Write the proportion equation
   902,443.83 : 1,245,371.40 = 494,571.30 : x
2. Step 2: Convert to fraction form
   902,443.83/1,245,371.40 = 494,571.30/x
3. Step 3: Cross multiply
   902,443.83x = 1,245,371.40 × 494,571.30
4. Step 4: Simplify right side
   902,443.83x = 615,924,952,280.82
5. Step 5: Solve for x
   x = 615,924,952,280.82/902,443.83
6. Step 6: Final answer
   x = 682,507.80