Finding the Third Proportional to 7,989,912 and 12,357,756

Step by Step Solution

1. Step 1: Write the proportion equation
   7,989,912 : 12,357,756 = 12,357,756 : x
2. Step 2: Convert to fraction form
   7,989,912/12,357,756 = 12,357,756/x
3. Step 3: Cross multiply
   7,989,912x = 12,357,756 × 12,357,756
4. Step 4: Simplify right side
   7,989,912x = 152,714,133,355,536
5. Step 5: Solve for x
   x = 152,714,133,355,536/7,989,912
6. Step 6: Final answer
   x = 19,113,368.63