Finding the Third Proportional to 276,300 and 405,384

Step by Step Solution

1. Step 1: Write the proportion equation
   276,300 : 405,384 = 405,384 : x
2. Step 2: Convert to fraction form
   276,300/405,384 = 405,384/x
3. Step 3: Cross multiply
   276,300x = 405,384 × 405,384
4. Step 4: Simplify right side
   276,300x = 164,336,187,456
5. Step 5: Solve for x
   x = 164,336,187,456/276,300
6. Step 6: Final answer
   x = 594,774.48