Finding the Third Proportional to 9,631,553,481 and 21,157,162,686

Step by Step Solution

1. Step 1: Write the proportion equation
   9,631,553,481 : 21,157,162,686 = 21,157,162,686 : x
2. Step 2: Convert to fraction form
   9,631,553,481/21,157,162,686 = 21,157,162,686/x
3. Step 3: Cross multiply
   9,631,553,481x = 21,157,162,686 × 21,157,162,686
4. Step 4: Simplify right side
   9,631,553,481x = 447,625,532,921,870,745,600
5. Step 5: Solve for x
   x = 447,625,532,921,870,745,600/9,631,553,481
6. Step 6: Final answer
   x = 46,474,904,988.58