Finding the Third Proportional to 276,948 and 396,042.75

Step by Step Solution

1. Step 1: Write the proportion equation
   276,948 : 396,042.75 = 396,042.75 : x
2. Step 2: Convert to fraction form
   276,948/396,042.75 = 396,042.75/x
3. Step 3: Cross multiply
   276,948x = 396,042.75 × 396,042.75
4. Step 4: Simplify right side
   276,948x = 156,849,859,827.56
5. Step 5: Solve for x
   x = 156,849,859,827.56/276,948
6. Step 6: Final answer
   x = 566,351.30