Finding the Third Proportional to 215,685 and 468,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,685 : 468,629.50 = 468,629.50 : x
2. Step 2: Convert to fraction form
   215,685/468,629.50 = 468,629.50/x
3. Step 3: Cross multiply
   215,685x = 468,629.50 × 468,629.50
4. Step 4: Simplify right side
   215,685x = 219,613,608,270.25
5. Step 5: Solve for x
   x = 219,613,608,270.25/215,685
6. Step 6: Final answer
   x = 1,018,214.56