Finding the Third Proportional to 1,688,391,981 and 3,667,431,072

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688,391,981 : 3,667,431,072 = 3,667,431,072 : x
2. Step 2: Convert to fraction form
   1,688,391,981/3,667,431,072 = 3,667,431,072/x
3. Step 3: Cross multiply
   1,688,391,981x = 3,667,431,072 × 3,667,431,072
4. Step 4: Simplify right side
   1,688,391,981x = 13,450,050,667,871,068,160
5. Step 5: Solve for x
   x = 13,450,050,667,871,068,160/1,688,391,981
6. Step 6: Final answer
   x = 7,966,189,616.65