Finding the Third Proportional to 155,912 and 342,510

Step by Step Solution

1. Step 1: Write the proportion equation
   155,912 : 342,510 = 342,510 : x
2. Step 2: Convert to fraction form
   155,912/342,510 = 342,510/x
3. Step 3: Cross multiply
   155,912x = 342,510 × 342,510
4. Step 4: Simplify right side
   155,912x = 117,313,100,100
5. Step 5: Solve for x
   x = 117,313,100,100/155,912
6. Step 6: Final answer
   x = 752,431.50