Finding the Third Proportional to 315,879.75 and 745,686

Step by Step Solution

1. Step 1: Write the proportion equation
   315,879.75 : 745,686 = 745,686 : x
2. Step 2: Convert to fraction form
   315,879.75/745,686 = 745,686/x
3. Step 3: Cross multiply
   315,879.75x = 745,686 × 745,686
4. Step 4: Simplify right side
   315,879.75x = 556,047,610,596
5. Step 5: Solve for x
   x = 556,047,610,596/315,879.75
6. Step 6: Final answer
   x = 1,760,314.20