Finding the Third Proportional to 80,656,738 and 176,989,892

Step by Step Solution

1. Step 1: Write the proportion equation
   80,656,738 : 176,989,892 = 176,989,892 : x
2. Step 2: Convert to fraction form
   80,656,738/176,989,892 = 176,989,892/x
3. Step 3: Cross multiply
   80,656,738x = 176,989,892 × 176,989,892
4. Step 4: Simplify right side
   80,656,738x = 31,325,421,870,171,664
5. Step 5: Solve for x
   x = 31,325,421,870,171,664/80,656,738
6. Step 6: Final answer
   x = 388,379,478.85