Finding the Third Proportional to 1,987,776 and 4,290,288

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,776 : 4,290,288 = 4,290,288 : x
2. Step 2: Convert to fraction form
   1,987,776/4,290,288 = 4,290,288/x
3. Step 3: Cross multiply
   1,987,776x = 4,290,288 × 4,290,288
4. Step 4: Simplify right side
   1,987,776x = 18,406,571,122,944
5. Step 5: Solve for x
   x = 18,406,571,122,944/1,987,776
6. Step 6: Final answer
   x = 9,259,881.96