Finding the Third Proportional to 621,876 and 1,374,432

Step by Step Solution

1. Step 1: Write the proportion equation
   621,876 : 1,374,432 = 1,374,432 : x
2. Step 2: Convert to fraction form
   621,876/1,374,432 = 1,374,432/x
3. Step 3: Cross multiply
   621,876x = 1,374,432 × 1,374,432
4. Step 4: Simplify right side
   621,876x = 1,889,063,322,624
5. Step 5: Solve for x
   x = 1,889,063,322,624/621,876
6. Step 6: Final answer
   x = 3,037,684.88