Finding the Third Proportional to 276,907.78 and 414,900.56

Step by Step Solution

1. Step 1: Write the proportion equation
   276,907.78 : 414,900.56 = 414,900.56 : x
2. Step 2: Convert to fraction form
   276,907.78/414,900.56 = 414,900.56/x
3. Step 3: Cross multiply
   276,907.78x = 414,900.56 × 414,900.56
4. Step 4: Simplify right side
   276,907.78x = 172,142,476,762.82
5. Step 5: Solve for x
   x = 172,142,476,762.82/276,907.78
6. Step 6: Final answer
   x = 621,659.95