Finding the Third Proportional to 1,939,722 and 4,215,213

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939,722 : 4,215,213 = 4,215,213 : x
2. Step 2: Convert to fraction form
   1,939,722/4,215,213 = 4,215,213/x
3. Step 3: Cross multiply
   1,939,722x = 4,215,213 × 4,215,213
4. Step 4: Simplify right side
   1,939,722x = 17,768,020,635,369
5. Step 5: Solve for x
   x = 17,768,020,635,369/1,939,722
6. Step 6: Final answer
   x = 9,160,086.15