Finding the Third Proportional to 9,778,629,225 and 21,181,771,068

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,629,225 : 21,181,771,068 = 21,181,771,068 : x
2. Step 2: Convert to fraction form
   9,778,629,225/21,181,771,068 = 21,181,771,068/x
3. Step 3: Cross multiply
   9,778,629,225x = 21,181,771,068 × 21,181,771,068
4. Step 4: Simplify right side
   9,778,629,225x = 448,667,425,577,161,850,880
5. Step 5: Solve for x
   x = 448,667,425,577,161,850,880/9,778,629,225
6. Step 6: Final answer
   x = 45,882,445,816.65