Finding the Third Proportional to 436,903.50 and 678,675

Step by Step Solution

1. Step 1: Write the proportion equation
   436,903.50 : 678,675 = 678,675 : x
2. Step 2: Convert to fraction form
   436,903.50/678,675 = 678,675/x
3. Step 3: Cross multiply
   436,903.50x = 678,675 × 678,675
4. Step 4: Simplify right side
   436,903.50x = 460,599,755,625
5. Step 5: Solve for x
   x = 460,599,755,625/436,903.50
6. Step 6: Final answer
   x = 1,054,236.82