Finding the Third Proportional to 377,018 and 780,280

Step by Step Solution

1. Step 1: Write the proportion equation
   377,018 : 780,280 = 780,280 : x
2. Step 2: Convert to fraction form
   377,018/780,280 = 780,280/x
3. Step 3: Cross multiply
   377,018x = 780,280 × 780,280
4. Step 4: Simplify right side
   377,018x = 608,836,878,400
5. Step 5: Solve for x
   x = 608,836,878,400/377,018
6. Step 6: Final answer
   x = 1,614,874.83