Finding the Fourth Proportional to 770,061.31, 1,062,257.99 and 447,735.78

Step by Step Solution

1. Step 1: Write the proportion equation
   770,061.31 : 1,062,257.99 = 447,735.78 : x
2. Step 2: Convert to fraction form
   770,061.31/1,062,257.99 = 447,735.78/x
3. Step 3: Cross multiply
   770,061.31x = 1,062,257.99 × 447,735.78
4. Step 4: Simplify right side
   770,061.31x = 475,610,907,475.20
5. Step 5: Solve for x
   x = 475,610,907,475.20/770,061.31
6. Step 6: Final answer
   x = 617,627.33