Finding the Third Proportional to 345,420 and 743,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,420 : 743,327.50 = 743,327.50 : x
2. Step 2: Convert to fraction form
   345,420/743,327.50 = 743,327.50/x
3. Step 3: Cross multiply
   345,420x = 743,327.50 × 743,327.50
4. Step 4: Simplify right side
   345,420x = 552,535,772,256.25
5. Step 5: Solve for x
   x = 552,535,772,256.25/345,420
6. Step 6: Final answer
   x = 1,599,605.62