Finding the Third Proportional to 298,399.50 and 610,585.50

Step by Step Solution

1. Step 1: Write the proportion equation
   298,399.50 : 610,585.50 = 610,585.50 : x
2. Step 2: Convert to fraction form
   298,399.50/610,585.50 = 610,585.50/x
3. Step 3: Cross multiply
   298,399.50x = 610,585.50 × 610,585.50
4. Step 4: Simplify right side
   298,399.50x = 372,814,652,810.25
5. Step 5: Solve for x
   x = 372,814,652,810.25/298,399.50
6. Step 6: Final answer
   x = 1,249,380.96