Finding the Third Proportional to 276,812 and 413,776.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,812 : 413,776.50 = 413,776.50 : x
2. Step 2: Convert to fraction form
   276,812/413,776.50 = 413,776.50/x
3. Step 3: Cross multiply
   276,812x = 413,776.50 × 413,776.50
4. Step 4: Simplify right side
   276,812x = 171,210,991,952.25
5. Step 5: Solve for x
   x = 171,210,991,952.25/276,812
6. Step 6: Final answer
   x = 618,510.01