Finding the Third Proportional to 10,019,449,182 and 19,785,991,520

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019,449,182 : 19,785,991,520 = 19,785,991,520 : x
2. Step 2: Convert to fraction form
   10,019,449,182/19,785,991,520 = 19,785,991,520/x
3. Step 3: Cross multiply
   10,019,449,182x = 19,785,991,520 × 19,785,991,520
4. Step 4: Simplify right side
   10,019,449,182x = 391,485,460,429,511,917,568
5. Step 5: Solve for x
   x = 391,485,460,429,511,917,568/10,019,449,182
6. Step 6: Final answer
   x = 39,072,553,123.26