Finding the Third Proportional to 665,072 and 1,377,440

Step by Step Solution

1. Step 1: Write the proportion equation
   665,072 : 1,377,440 = 1,377,440 : x
2. Step 2: Convert to fraction form
   665,072/1,377,440 = 1,377,440/x
3. Step 3: Cross multiply
   665,072x = 1,377,440 × 1,377,440
4. Step 4: Simplify right side
   665,072x = 1,897,340,953,600
5. Step 5: Solve for x
   x = 1,897,340,953,600/665,072
6. Step 6: Final answer
   x = 2,852,835.41