Finding the Third Proportional to 155,820 and 340,458

Step by Step Solution

1. Step 1: Write the proportion equation
   155,820 : 340,458 = 340,458 : x
2. Step 2: Convert to fraction form
   155,820/340,458 = 340,458/x
3. Step 3: Cross multiply
   155,820x = 340,458 × 340,458
4. Step 4: Simplify right side
   155,820x = 115,911,649,764
5. Step 5: Solve for x
   x = 115,911,649,764/155,820
6. Step 6: Final answer
   x = 743,881.72