Finding the Third Proportional to 8,311,708,404 and 12,478,505,382

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311,708,404 : 12,478,505,382 = 12,478,505,382 : x
2. Step 2: Convert to fraction form
   8,311,708,404/12,478,505,382 = 12,478,505,382/x
3. Step 3: Cross multiply
   8,311,708,404x = 12,478,505,382 × 12,478,505,382
4. Step 4: Simplify right side
   8,311,708,404x = 155,713,096,568,602,951,680
5. Step 5: Solve for x
   x = 155,713,096,568,602,951,680/8,311,708,404
6. Step 6: Final answer
   x = 18,734,186,643.71