Finding the Third Proportional to 2,139,664,138 and 4,659,181,888

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,664,138 : 4,659,181,888 = 4,659,181,888 : x
2. Step 2: Convert to fraction form
   2,139,664,138/4,659,181,888 = 4,659,181,888/x
3. Step 3: Cross multiply
   2,139,664,138x = 4,659,181,888 × 4,659,181,888
4. Step 4: Simplify right side
   2,139,664,138x = 21,707,975,865,467,244,544
5. Step 5: Solve for x
   x = 21,707,975,865,467,244,544/2,139,664,138
6. Step 6: Final answer
   x = 10,145,506,240.88