Finding the Third Proportional to 1,841,278 and 3,938,420

Step by Step Solution

1. Step 1: Write the proportion equation
   1,841,278 : 3,938,420 = 3,938,420 : x
2. Step 2: Convert to fraction form
   1,841,278/3,938,420 = 3,938,420/x
3. Step 3: Cross multiply
   1,841,278x = 3,938,420 × 3,938,420
4. Step 4: Simplify right side
   1,841,278x = 15,511,152,096,400
5. Step 5: Solve for x
   x = 15,511,152,096,400/1,841,278
6. Step 6: Final answer
   x = 8,424,122.86