Finding the Third Proportional to 643,176 and 1,374,904

Step by Step Solution

1. Step 1: Write the proportion equation
   643,176 : 1,374,904 = 1,374,904 : x
2. Step 2: Convert to fraction form
   643,176/1,374,904 = 1,374,904/x
3. Step 3: Cross multiply
   643,176x = 1,374,904 × 1,374,904
4. Step 4: Simplify right side
   643,176x = 1,890,361,009,216
5. Step 5: Solve for x
   x = 1,890,361,009,216/643,176
6. Step 6: Final answer
   x = 2,939,103.77