Finding the Third Proportional to 9,219,736,326 and 19,837,815,909

Step by Step Solution

1. Step 1: Write the proportion equation
   9,219,736,326 : 19,837,815,909 = 19,837,815,909 : x
2. Step 2: Convert to fraction form
   9,219,736,326/19,837,815,909 = 19,837,815,909/x
3. Step 3: Cross multiply
   9,219,736,326x = 19,837,815,909 × 19,837,815,909
4. Step 4: Simplify right side
   9,219,736,326x = 393,538,940,039,373,520,896
5. Step 5: Solve for x
   x = 393,538,940,039,373,520,896/9,219,736,326
6. Step 6: Final answer
   x = 42,684,402,907.44