Finding the Third Proportional to 643,056 and 1,374,684

Step by Step Solution

1. Step 1: Write the proportion equation
   643,056 : 1,374,684 = 1,374,684 : x
2. Step 2: Convert to fraction form
   643,056/1,374,684 = 1,374,684/x
3. Step 3: Cross multiply
   643,056x = 1,374,684 × 1,374,684
4. Step 4: Simplify right side
   643,056x = 1,889,756,099,856
5. Step 5: Solve for x
   x = 1,889,756,099,856/643,056
6. Step 6: Final answer
   x = 2,938,711.56