Finding the Third Proportional to 9,997,362,129 and 21,499,292,778

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997,362,129 : 21,499,292,778 = 21,499,292,778 : x
2. Step 2: Convert to fraction form
   9,997,362,129/21,499,292,778 = 21,499,292,778/x
3. Step 3: Cross multiply
   9,997,362,129x = 21,499,292,778 × 21,499,292,778
4. Step 4: Simplify right side
   9,997,362,129x = 462,219,589,954,162,982,912
5. Step 5: Solve for x
   x = 462,219,589,954,162,982,912/9,997,362,129
6. Step 6: Final answer
   x = 46,234,154,969.08