Finding the Third Proportional to 267,866.50 and 415,030

Step by Step Solution

1. Step 1: Write the proportion equation
   267,866.50 : 415,030 = 415,030 : x
2. Step 2: Convert to fraction form
   267,866.50/415,030 = 415,030/x
3. Step 3: Cross multiply
   267,866.50x = 415,030 × 415,030
4. Step 4: Simplify right side
   267,866.50x = 172,249,900,900
5. Step 5: Solve for x
   x = 172,249,900,900/267,866.50
6. Step 6: Final answer
   x = 643,043.83