Finding the Third Proportional to 78,637,328,474 and 173,303,448,949

Step by Step Solution

1. Step 1: Write the proportion equation
   78,637,328,474 : 173,303,448,949 = 173,303,448,949 : x
2. Step 2: Convert to fraction form
   78,637,328,474/173,303,448,949 = 173,303,448,949/x
3. Step 3: Cross multiply
   78,637,328,474x = 173,303,448,949 × 173,303,448,949
4. Step 4: Simplify right side
   78,637,328,474x = 30,034,085,417,618,650,431,488
5. Step 5: Solve for x
   x = 30,034,085,417,618,650,431,488/78,637,328,474
6. Step 6: Final answer
   x = 381,931,660,198.11