Finding the Third Proportional to 2,157,408 and 4,691,328

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,408 : 4,691,328 = 4,691,328 : x
2. Step 2: Convert to fraction form
   2,157,408/4,691,328 = 4,691,328/x
3. Step 3: Cross multiply
   2,157,408x = 4,691,328 × 4,691,328
4. Step 4: Simplify right side
   2,157,408x = 22,008,558,403,584
5. Step 5: Solve for x
   x = 22,008,558,403,584/2,157,408
6. Step 6: Final answer
   x = 10,201,389.08