Finding the Third Proportional to 267,813 and 355,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   267,813 : 355,421.50 = 355,421.50 : x
2. Step 2: Convert to fraction form
   267,813/355,421.50 = 355,421.50/x
3. Step 3: Cross multiply
   267,813x = 355,421.50 × 355,421.50
4. Step 4: Simplify right side
   267,813x = 126,324,442,662.25
5. Step 5: Solve for x
   x = 126,324,442,662.25/267,813
6. Step 6: Final answer
   x = 471,688.99