Finding the Third Proportional to 434,978 and 665,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,978 : 665,468.50 = 665,468.50 : x
2. Step 2: Convert to fraction form
   434,978/665,468.50 = 665,468.50/x
3. Step 3: Cross multiply
   434,978x = 665,468.50 × 665,468.50
4. Step 4: Simplify right side
   434,978x = 442,848,324,492.25
5. Step 5: Solve for x
   x = 442,848,324,492.25/434,978
6. Step 6: Final answer
   x = 1,018,093.62