Finding the Third Proportional to 312,258 and 736,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,258 : 736,879.50 = 736,879.50 : x
2. Step 2: Convert to fraction form
   312,258/736,879.50 = 736,879.50/x
3. Step 3: Cross multiply
   312,258x = 736,879.50 × 736,879.50
4. Step 4: Simplify right side
   312,258x = 542,991,397,520.25
5. Step 5: Solve for x
   x = 542,991,397,520.25/312,258
6. Step 6: Final answer
   x = 1,738,919.09