Finding the Third Proportional to 345,664.50 and 718,920

Step by Step Solution

1. Step 1: Write the proportion equation
   345,664.50 : 718,920 = 718,920 : x
2. Step 2: Convert to fraction form
   345,664.50/718,920 = 718,920/x
3. Step 3: Cross multiply
   345,664.50x = 718,920 × 718,920
4. Step 4: Simplify right side
   345,664.50x = 516,845,966,400
5. Step 5: Solve for x
   x = 516,845,966,400/345,664.50
6. Step 6: Final answer
   x = 1,495,224.32