Finding the Third Proportional to 643,567 and 846,290

Step by Step Solution

1. Step 1: Write the proportion equation
   643,567 : 846,290 = 846,290 : x
2. Step 2: Convert to fraction form
   643,567/846,290 = 846,290/x
3. Step 3: Cross multiply
   643,567x = 846,290 × 846,290
4. Step 4: Simplify right side
   643,567x = 716,206,764,100
5. Step 5: Solve for x
   x = 716,206,764,100/643,567
6. Step 6: Final answer
   x = 1,112,870.55