Finding the Third Proportional to 12,743,555,245 and 19,990,877,844

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743,555,245 : 19,990,877,844 = 19,990,877,844 : x
2. Step 2: Convert to fraction form
   12,743,555,245/19,990,877,844 = 19,990,877,844/x
3. Step 3: Cross multiply
   12,743,555,245x = 19,990,877,844 × 19,990,877,844
4. Step 4: Simplify right side
   12,743,555,245x = 399,635,196,973,730,103,296
5. Step 5: Solve for x
   x = 399,635,196,973,730,103,296/12,743,555,245
6. Step 6: Final answer
   x = 31,359,788,480.58