Finding the Third Proportional to 318,870 and 699,941.25

Step by Step Solution

1. Step 1: Write the proportion equation
   318,870 : 699,941.25 = 699,941.25 : x
2. Step 2: Convert to fraction form
   318,870/699,941.25 = 699,941.25/x
3. Step 3: Cross multiply
   318,870x = 699,941.25 × 699,941.25
4. Step 4: Simplify right side
   318,870x = 489,917,753,451.56
5. Step 5: Solve for x
   x = 489,917,753,451.56/318,870
6. Step 6: Final answer
   x = 1,536,418.46