Finding the Third Proportional to 3,989,012 and 8,775,784

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,012 : 8,775,784 = 8,775,784 : x
2. Step 2: Convert to fraction form
   3,989,012/8,775,784 = 8,775,784/x
3. Step 3: Cross multiply
   3,989,012x = 8,775,784 × 8,775,784
4. Step 4: Simplify right side
   3,989,012x = 77,014,384,814,656
5. Step 5: Solve for x
   x = 77,014,384,814,656/3,989,012
6. Step 6: Final answer
   x = 19,306,631.52