Finding the Third Proportional to 215,124 and 315,066

Step by Step Solution

1. Step 1: Write the proportion equation
   215,124 : 315,066 = 315,066 : x
2. Step 2: Convert to fraction form
   215,124/315,066 = 315,066/x
3. Step 3: Cross multiply
   215,124x = 315,066 × 315,066
4. Step 4: Simplify right side
   215,124x = 99,266,584,356
5. Step 5: Solve for x
   x = 99,266,584,356/215,124
6. Step 6: Final answer
   x = 461,438.91