Finding the Third Proportional to 267,778 and 391,404.75

Step by Step Solution

1. Step 1: Write the proportion equation
   267,778 : 391,404.75 = 391,404.75 : x
2. Step 2: Convert to fraction form
   267,778/391,404.75 = 391,404.75/x
3. Step 3: Cross multiply
   267,778x = 391,404.75 × 391,404.75
4. Step 4: Simplify right side
   267,778x = 153,197,678,322.56
5. Step 5: Solve for x
   x = 153,197,678,322.56/267,778
6. Step 6: Final answer
   x = 572,107.04