Finding the Fourth Proportional to 674,483.98, 1,012,426.73 and 451,403.31

Step by Step Solution

1. Step 1: Write the proportion equation
   674,483.98 : 1,012,426.73 = 451,403.31 : x
2. Step 2: Convert to fraction form
   674,483.98/1,012,426.73 = 451,403.31/x
3. Step 3: Cross multiply
   674,483.98x = 1,012,426.73 × 451,403.31
4. Step 4: Simplify right side
   674,483.98x = 457,012,777,054.48
5. Step 5: Solve for x
   x = 457,012,777,054.48/674,483.98
6. Step 6: Final answer
   x = 677,573.95