Finding the Third Proportional to 210,288 and 461,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,288 : 461,287.50 = 461,287.50 : x
2. Step 2: Convert to fraction form
   210,288/461,287.50 = 461,287.50/x
3. Step 3: Cross multiply
   210,288x = 461,287.50 × 461,287.50
4. Step 4: Simplify right side
   210,288x = 212,786,157,656.25
5. Step 5: Solve for x
   x = 212,786,157,656.25/210,288
6. Step 6: Final answer
   x = 1,011,879.70