Finding the Third Proportional to 643,104 and 1,374,792

Step by Step Solution

1. Step 1: Write the proportion equation
   643,104 : 1,374,792 = 1,374,792 : x
2. Step 2: Convert to fraction form
   643,104/1,374,792 = 1,374,792/x
3. Step 3: Cross multiply
   643,104x = 1,374,792 × 1,374,792
4. Step 4: Simplify right side
   643,104x = 1,890,053,043,264
5. Step 5: Solve for x
   x = 1,890,053,043,264/643,104
6. Step 6: Final answer
   x = 2,938,953.95