Finding the Third Proportional to 276,565.50 and 378,494

Step by Step Solution

1. Step 1: Write the proportion equation
   276,565.50 : 378,494 = 378,494 : x
2. Step 2: Convert to fraction form
   276,565.50/378,494 = 378,494/x
3. Step 3: Cross multiply
   276,565.50x = 378,494 × 378,494
4. Step 4: Simplify right side
   276,565.50x = 143,257,708,036
5. Step 5: Solve for x
   x = 143,257,708,036/276,565.50
6. Step 6: Final answer
   x = 517,988.35