Finding the Third Proportional to 613,688 and 1,338,940

Step by Step Solution

1. Step 1: Write the proportion equation
   613,688 : 1,338,940 = 1,338,940 : x
2. Step 2: Convert to fraction form
   613,688/1,338,940 = 1,338,940/x
3. Step 3: Cross multiply
   613,688x = 1,338,940 × 1,338,940
4. Step 4: Simplify right side
   613,688x = 1,792,760,323,600
5. Step 5: Solve for x
   x = 1,792,760,323,600/613,688
6. Step 6: Final answer
   x = 2,921,289.52