Finding the Third Proportional to 155,870 and 251,019

Step by Step Solution

1. Step 1: Write the proportion equation
   155,870 : 251,019 = 251,019 : x
2. Step 2: Convert to fraction form
   155,870/251,019 = 251,019/x
3. Step 3: Cross multiply
   155,870x = 251,019 × 251,019
4. Step 4: Simplify right side
   155,870x = 63,010,538,361
5. Step 5: Solve for x
   x = 63,010,538,361/155,870
6. Step 6: Final answer
   x = 404,250.58