Finding the Third Proportional to 315,975.94 and 691,066.69

Step by Step Solution

1. Step 1: Write the proportion equation
   315,975.94 : 691,066.69 = 691,066.69 : x
2. Step 2: Convert to fraction form
   315,975.94/691,066.69 = 691,066.69/x
3. Step 3: Cross multiply
   315,975.94x = 691,066.69 × 691,066.69
4. Step 4: Simplify right side
   315,975.94x = 477,573,166,572.22
5. Step 5: Solve for x
   x = 477,573,166,572.22/315,975.94
6. Step 6: Final answer
   x = 1,511,422.58