Finding the Third Proportional to 158,494 and 345,420

Step by Step Solution

1. Step 1: Write the proportion equation
   158,494 : 345,420 = 345,420 : x
2. Step 2: Convert to fraction form
   158,494/345,420 = 345,420/x
3. Step 3: Cross multiply
   158,494x = 345,420 × 345,420
4. Step 4: Simplify right side
   158,494x = 119,314,976,400
5. Step 5: Solve for x
   x = 119,314,976,400/158,494
6. Step 6: Final answer
   x = 752,804.37