Finding the Third Proportional to 435,891 and 678,460.50

Step by Step Solution

1. Step 1: Write the proportion equation
   435,891 : 678,460.50 = 678,460.50 : x
2. Step 2: Convert to fraction form
   435,891/678,460.50 = 678,460.50/x
3. Step 3: Cross multiply
   435,891x = 678,460.50 × 678,460.50
4. Step 4: Simplify right side
   435,891x = 460,308,650,060.25
5. Step 5: Solve for x
   x = 460,308,650,060.25/435,891
6. Step 6: Final answer
   x = 1,056,017.79