Finding the Third Proportional to 311,100.75 and 664,848

Step by Step Solution

1. Step 1: Write the proportion equation
   311,100.75 : 664,848 = 664,848 : x
2. Step 2: Convert to fraction form
   311,100.75/664,848 = 664,848/x
3. Step 3: Cross multiply
   311,100.75x = 664,848 × 664,848
4. Step 4: Simplify right side
   311,100.75x = 442,022,863,104
5. Step 5: Solve for x
   x = 442,022,863,104/311,100.75
6. Step 6: Final answer
   x = 1,420,835.09