Finding the Third Proportional to 21,015,572 and 45,618,216

Step by Step Solution

1. Step 1: Write the proportion equation
   21,015,572 : 45,618,216 = 45,618,216 : x
2. Step 2: Convert to fraction form
   21,015,572/45,618,216 = 45,618,216/x
3. Step 3: Cross multiply
   21,015,572x = 45,618,216 × 45,618,216
4. Step 4: Simplify right side
   21,015,572x = 2,081,021,631,022,656
5. Step 5: Solve for x
   x = 2,081,021,631,022,656/21,015,572
6. Step 6: Final answer
   x = 99,022,840.35