Finding the Third Proportional to 873,289 and 1,388,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   873,289 : 1,388,665.50 = 1,388,665.50 : x
2. Step 2: Convert to fraction form
   873,289/1,388,665.50 = 1,388,665.50/x
3. Step 3: Cross multiply
   873,289x = 1,388,665.50 × 1,388,665.50
4. Step 4: Simplify right side
   873,289x = 1,928,391,870,890.25
5. Step 5: Solve for x
   x = 1,928,391,870,890.25/873,289
6. Step 6: Final answer
   x = 2,208,194.39