Finding the Third Proportional to 215,606.50 and 458,823.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,606.50 : 458,823.50 = 458,823.50 : x
2. Step 2: Convert to fraction form
   215,606.50/458,823.50 = 458,823.50/x
3. Step 3: Cross multiply
   215,606.50x = 458,823.50 × 458,823.50
4. Step 4: Simplify right side
   215,606.50x = 210,519,004,152.25
5. Step 5: Solve for x
   x = 210,519,004,152.25/215,606.50
6. Step 6: Final answer
   x = 976,403.79