Finding the Third Proportional to 28,197,709,888 and 42,659,819,517

Step by Step Solution

1. Step 1: Write the proportion equation
   28,197,709,888 : 42,659,819,517 = 42,659,819,517 : x
2. Step 2: Convert to fraction form
   28,197,709,888/42,659,819,517 = 42,659,819,517/x
3. Step 3: Cross multiply
   28,197,709,888x = 42,659,819,517 × 42,659,819,517
4. Step 4: Simplify right side
   28,197,709,888x = 1,819,860,201,223,014,055,936
5. Step 5: Solve for x
   x = 1,819,860,201,223,014,055,936/28,197,709,888
6. Step 6: Final answer
   x = 64,539,290,901.69