Finding the Third Proportional to 12,485,642,808 and 18,039,597,737

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485,642,808 : 18,039,597,737 = 18,039,597,737 : x
2. Step 2: Convert to fraction form
   12,485,642,808/18,039,597,737 = 18,039,597,737/x
3. Step 3: Cross multiply
   12,485,642,808x = 18,039,597,737 × 18,039,597,737
4. Step 4: Simplify right side
   12,485,642,808x = 325,427,086,512,775,495,680
5. Step 5: Solve for x
   x = 325,427,086,512,775,495,680/12,485,642,808
6. Step 6: Final answer
   x = 26,064,103,508.09