Finding the Third Proportional to 12,485,642,312 and 18,039,597,008

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485,642,312 : 18,039,597,008 = 18,039,597,008 : x
2. Step 2: Convert to fraction form
   12,485,642,312/18,039,597,008 = 18,039,597,008/x
3. Step 3: Cross multiply
   12,485,642,312x = 18,039,597,008 × 18,039,597,008
4. Step 4: Simplify right side
   12,485,642,312x = 325,427,060,211,042,549,760
5. Step 5: Solve for x
   x = 325,427,060,211,042,549,760/12,485,642,312
6. Step 6: Final answer
   x = 26,064,102,436.95