Finding the Third Proportional to 21,123 and 45,365

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123 : 45,365 = 45,365 : x
2. Step 2: Convert to fraction form
   21,123/45,365 = 45,365/x
3. Step 3: Cross multiply
   21,123x = 45,365 × 45,365
4. Step 4: Simplify right side
   21,123x = 2,057,983,225
5. Step 5: Solve for x
   x = 2,057,983,225/21,123
6. Step 6: Final answer
   x = 97,428.55