Finding the Third Proportional to 345,637 and 718,864.25

Step by Step Solution

1. Step 1: Write the proportion equation
   345,637 : 718,864.25 = 718,864.25 : x
2. Step 2: Convert to fraction form
   345,637/718,864.25 = 718,864.25/x
3. Step 3: Cross multiply
   345,637x = 718,864.25 × 718,864.25
4. Step 4: Simplify right side
   345,637x = 516,765,809,928.06
5. Step 5: Solve for x
   x = 516,765,809,928.06/345,637
6. Step 6: Final answer
   x = 1,495,111.37