Finding the Third Proportional to 84,503,978 and 178,086,738

Step by Step Solution

1. Step 1: Write the proportion equation
   84,503,978 : 178,086,738 = 178,086,738 : x
2. Step 2: Convert to fraction form
   84,503,978/178,086,738 = 178,086,738/x
3. Step 3: Cross multiply
   84,503,978x = 178,086,738 × 178,086,738
4. Step 4: Simplify right side
   84,503,978x = 31,714,886,251,480,644
5. Step 5: Solve for x
   x = 31,714,886,251,480,644/84,503,978
6. Step 6: Final answer
   x = 375,306,429.38