Finding the Third Proportional to 621,676 and 912,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   621,676 : 912,115.50 = 912,115.50 : x
2. Step 2: Convert to fraction form
   621,676/912,115.50 = 912,115.50/x
3. Step 3: Cross multiply
   621,676x = 912,115.50 × 912,115.50
4. Step 4: Simplify right side
   621,676x = 831,954,685,340.25
5. Step 5: Solve for x
   x = 831,954,685,340.25/621,676
6. Step 6: Final answer
   x = 1,338,244.82