Finding the Third Proportional to 64,940 and 141,790

Step by Step Solution

1. Step 1: Write the proportion equation
   64,940 : 141,790 = 141,790 : x
2. Step 2: Convert to fraction form
   64,940/141,790 = 141,790/x
3. Step 3: Cross multiply
   64,940x = 141,790 × 141,790
4. Step 4: Simplify right side
   64,940x = 20,104,404,100
5. Step 5: Solve for x
   x = 20,104,404,100/64,940
6. Step 6: Final answer
   x = 309,584.29