Finding the Third Proportional to 267,856.50 and 405,243

Step by Step Solution

1. Step 1: Write the proportion equation
   267,856.50 : 405,243 = 405,243 : x
2. Step 2: Convert to fraction form
   267,856.50/405,243 = 405,243/x
3. Step 3: Cross multiply
   267,856.50x = 405,243 × 405,243
4. Step 4: Simplify right side
   267,856.50x = 164,221,889,049
5. Step 5: Solve for x
   x = 164,221,889,049/267,856.50
6. Step 6: Final answer
   x = 613,096.52