Finding the Third Proportional to 276,528 and 439,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,528 : 439,698.50 = 439,698.50 : x
2. Step 2: Convert to fraction form
   276,528/439,698.50 = 439,698.50/x
3. Step 3: Cross multiply
   276,528x = 439,698.50 × 439,698.50
4. Step 4: Simplify right side
   276,528x = 193,334,770,902.25
5. Step 5: Solve for x
   x = 193,334,770,902.25/276,528
6. Step 6: Final answer
   x = 699,150.79