Finding the Third Proportional to 9,691,841,078 and 21,081,793,615

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,841,078 : 21,081,793,615 = 21,081,793,615 : x
2. Step 2: Convert to fraction form
   9,691,841,078/21,081,793,615 = 21,081,793,615/x
3. Step 3: Cross multiply
   9,691,841,078x = 21,081,793,615 × 21,081,793,615
4. Step 4: Simplify right side
   9,691,841,078x = 444,442,022,025,454,747,648
5. Step 5: Solve for x
   x = 444,442,022,025,454,747,648/9,691,841,078
6. Step 6: Final answer
   x = 45,857,336,954.72