Finding the Third Proportional to 148,260 and 315,314

Step by Step Solution

1. Step 1: Write the proportion equation
   148,260 : 315,314 = 315,314 : x
2. Step 2: Convert to fraction form
   148,260/315,314 = 315,314/x
3. Step 3: Cross multiply
   148,260x = 315,314 × 315,314
4. Step 4: Simplify right side
   148,260x = 99,422,918,596
5. Step 5: Solve for x
   x = 99,422,918,596/148,260
6. Step 6: Final answer
   x = 670,598.40