Finding the Third Proportional to 19,445,638 and 42,390,284

Step by Step Solution

1. Step 1: Write the proportion equation
   19,445,638 : 42,390,284 = 42,390,284 : x
2. Step 2: Convert to fraction form
   19,445,638/42,390,284 = 42,390,284/x
3. Step 3: Cross multiply
   19,445,638x = 42,390,284 × 42,390,284
4. Step 4: Simplify right side
   19,445,638x = 1,796,936,177,600,656
5. Step 5: Solve for x
   x = 1,796,936,177,600,656/19,445,638
6. Step 6: Final answer
   x = 92,408,188.28