Finding the Third Proportional to 78,637,329,720 and 173,303,451,540

Step by Step Solution

1. Step 1: Write the proportion equation
   78,637,329,720 : 173,303,451,540 = 173,303,451,540 : x
2. Step 2: Convert to fraction form
   78,637,329,720/173,303,451,540 = 173,303,451,540/x
3. Step 3: Cross multiply
   78,637,329,720x = 173,303,451,540 × 173,303,451,540
4. Step 4: Simplify right side
   78,637,329,720x = 30,034,086,315,677,127,278,592
5. Step 5: Solve for x
   x = 30,034,086,315,677,127,278,592/78,637,329,720
6. Step 6: Final answer
   x = 381,931,665,566.70