Finding the Third Proportional to 377,066 and 780,380

Step by Step Solution

1. Step 1: Write the proportion equation
   377,066 : 780,380 = 780,380 : x
2. Step 2: Convert to fraction form
   377,066/780,380 = 780,380/x
3. Step 3: Cross multiply
   377,066x = 780,380 × 780,380
4. Step 4: Simplify right side
   377,066x = 608,992,944,400
5. Step 5: Solve for x
   x = 608,992,944,400/377,066
6. Step 6: Final answer
   x = 1,615,083.15