Finding the Third Proportional to 137,308 and 320,790

Step by Step Solution

1. Step 1: Write the proportion equation
   137,308 : 320,790 = 320,790 : x
2. Step 2: Convert to fraction form
   137,308/320,790 = 320,790/x
3. Step 3: Cross multiply
   137,308x = 320,790 × 320,790
4. Step 4: Simplify right side
   137,308x = 102,906,224,100
5. Step 5: Solve for x
   x = 102,906,224,100/137,308
6. Step 6: Final answer
   x = 749,455.41