Finding the Fourth Proportional to 945,870.45, 1,305,290.48 and 516,157.89

Step by Step Solution

1. Step 1: Write the proportion equation
   945,870.45 : 1,305,290.48 = 516,157.89 : x
2. Step 2: Convert to fraction form
   945,870.45/1,305,290.48 = 516,157.89/x
3. Step 3: Cross multiply
   945,870.45x = 1,305,290.48 × 516,157.89
4. Step 4: Simplify right side
   945,870.45x = 673,735,977,413.10
5. Step 5: Solve for x
   x = 673,735,977,413.10/945,870.45
6. Step 6: Final answer
   x = 712,292.02