Finding the Third Proportional to 3,989,008 and 8,775,776

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,008 : 8,775,776 = 8,775,776 : x
2. Step 2: Convert to fraction form
   3,989,008/8,775,776 = 8,775,776/x
3. Step 3: Cross multiply
   3,989,008x = 8,775,776 × 8,775,776
4. Step 4: Simplify right side
   3,989,008x = 77,014,244,402,176
5. Step 5: Solve for x
   x = 77,014,244,402,176/3,989,008
6. Step 6: Final answer
   x = 19,306,615.68