Finding the Third Proportional to 12,485,642,808 and 18,039,597,735

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485,642,808 : 18,039,597,735 = 18,039,597,735 : x
2. Step 2: Convert to fraction form
   12,485,642,808/18,039,597,735 = 18,039,597,735/x
3. Step 3: Cross multiply
   12,485,642,808x = 18,039,597,735 × 18,039,597,735
4. Step 4: Simplify right side
   12,485,642,808x = 325,427,086,440,617,148,416
5. Step 5: Solve for x
   x = 325,427,086,440,617,148,416/12,485,642,808
6. Step 6: Final answer
   x = 26,064,103,502.31