Finding the Fourth Proportional to 698,978.43, 1,046,892.47 and 489,551.31

Step by Step Solution

1. Step 1: Write the proportion equation
   698,978.43 : 1,046,892.47 = 489,551.31 : x
2. Step 2: Convert to fraction form
   698,978.43/1,046,892.47 = 489,551.31/x
3. Step 3: Cross multiply
   698,978.43x = 1,046,892.47 × 489,551.31
4. Step 4: Simplify right side
   698,978.43x = 512,507,577,669.88
5. Step 5: Solve for x
   x = 512,507,577,669.88/698,978.43
6. Step 6: Final answer
   x = 733,223.74