Finding the Third Proportional to 1,920,388 and 4,138,208

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920,388 : 4,138,208 = 4,138,208 : x
2. Step 2: Convert to fraction form
   1,920,388/4,138,208 = 4,138,208/x
3. Step 3: Cross multiply
   1,920,388x = 4,138,208 × 4,138,208
4. Step 4: Simplify right side
   1,920,388x = 17,124,765,451,264
5. Step 5: Solve for x
   x = 17,124,765,451,264/1,920,388
6. Step 6: Final answer
   x = 8,917,346.63