Finding the Third Proportional to 12,485,642,481 and 18,039,597,264

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485,642,481 : 18,039,597,264 = 18,039,597,264 : x
2. Step 2: Convert to fraction form
   12,485,642,481/18,039,597,264 = 18,039,597,264/x
3. Step 3: Cross multiply
   12,485,642,481x = 18,039,597,264 × 18,039,597,264
4. Step 4: Simplify right side
   12,485,642,481x = 325,427,069,447,316,307,968
5. Step 5: Solve for x
   x = 325,427,069,447,316,307,968/12,485,642,481
6. Step 6: Final answer
   x = 26,064,102,823.91