Finding the Third Proportional to 1,920,390 and 4,138,212

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920,390 : 4,138,212 = 4,138,212 : x
2. Step 2: Convert to fraction form
   1,920,390/4,138,212 = 4,138,212/x
3. Step 3: Cross multiply
   1,920,390x = 4,138,212 × 4,138,212
4. Step 4: Simplify right side
   1,920,390x = 17,124,798,556,944
5. Step 5: Solve for x
   x = 17,124,798,556,944/1,920,390
6. Step 6: Final answer
   x = 8,917,354.58