Finding the Third Proportional to 170,128.69 and 371,386.69

Step by Step Solution

1. Step 1: Write the proportion equation
   170,128.69 : 371,386.69 = 371,386.69 : x
2. Step 2: Convert to fraction form
   170,128.69/371,386.69 = 371,386.69/x
3. Step 3: Cross multiply
   170,128.69x = 371,386.69 × 371,386.69
4. Step 4: Simplify right side
   170,128.69x = 137,928,071,652.22
5. Step 5: Solve for x
   x = 137,928,071,652.22/170,128.69
6. Step 6: Final answer
   x = 810,727.89