Finding the Third Proportional to 12,743,555,242.50 and 19,990,877,841

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743,555,242.50 : 19,990,877,841 = 19,990,877,841 : x
2. Step 2: Convert to fraction form
   12,743,555,242.50/19,990,877,841 = 19,990,877,841/x
3. Step 3: Cross multiply
   12,743,555,242.50x = 19,990,877,841 × 19,990,877,841
4. Step 4: Simplify right side
   12,743,555,242.50x = 399,635,196,853,784,805,376
5. Step 5: Solve for x
   x = 399,635,196,853,784,805,376/12,743,555,242.50
6. Step 6: Final answer
   x = 31,359,788,477.32