Finding the Third Proportional to 210,891 and 497,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,891 : 497,815.50 = 497,815.50 : x
2. Step 2: Convert to fraction form
   210,891/497,815.50 = 497,815.50/x
3. Step 3: Cross multiply
   210,891x = 497,815.50 × 497,815.50
4. Step 4: Simplify right side
   210,891x = 247,820,272,040.25
5. Step 5: Solve for x
   x = 247,820,272,040.25/210,891
6. Step 6: Final answer
   x = 1,175,110.71