Finding the Third Proportional to 357,275 and 772,870

Step by Step Solution

1. Step 1: Write the proportion equation
   357,275 : 772,870 = 772,870 : x
2. Step 2: Convert to fraction form
   357,275/772,870 = 772,870/x
3. Step 3: Cross multiply
   357,275x = 772,870 × 772,870
4. Step 4: Simplify right side
   357,275x = 597,328,036,900
5. Step 5: Solve for x
   x = 597,328,036,900/357,275
6. Step 6: Final answer
   x = 1,671,899.90