Finding the Third Proportional to 434,688 and 654,788

Step by Step Solution

1. Step 1: Write the proportion equation
   434,688 : 654,788 = 654,788 : x
2. Step 2: Convert to fraction form
   434,688/654,788 = 654,788/x
3. Step 3: Cross multiply
   434,688x = 654,788 × 654,788
4. Step 4: Simplify right side
   434,688x = 428,747,324,944
5. Step 5: Solve for x
   x = 428,747,324,944/434,688
6. Step 6: Final answer
   x = 986,333.47