Finding the Third Proportional to 221,721 and 486,362.63

Step by Step Solution

1. Step 1: Write the proportion equation
   221,721 : 486,362.63 = 486,362.63 : x
2. Step 2: Convert to fraction form
   221,721/486,362.63 = 486,362.63/x
3. Step 3: Cross multiply
   221,721x = 486,362.63 × 486,362.63
4. Step 4: Simplify right side
   221,721x = 236,548,602,996.89
5. Step 5: Solve for x
   x = 236,548,602,996.89/221,721
6. Step 6: Final answer
   x = 1,066,875.05