Finding the Third Proportional to 448,581.50 and 666,392

Step by Step Solution

1. Step 1: Write the proportion equation
   448,581.50 : 666,392 = 666,392 : x
2. Step 2: Convert to fraction form
   448,581.50/666,392 = 666,392/x
3. Step 3: Cross multiply
   448,581.50x = 666,392 × 666,392
4. Step 4: Simplify right side
   448,581.50x = 444,078,297,664
5. Step 5: Solve for x
   x = 444,078,297,664/448,581.50
6. Step 6: Final answer
   x = 989,961.24