Finding the Fourth Proportional to 672,419.38, 1,008,786.78 and 267,636.09

Step by Step Solution

1. Step 1: Write the proportion equation
   672,419.38 : 1,008,786.78 = 267,636.09 : x
2. Step 2: Convert to fraction form
   672,419.38/1,008,786.78 = 267,636.09/x
3. Step 3: Cross multiply
   672,419.38x = 1,008,786.78 × 267,636.09
4. Step 4: Simplify right side
   672,419.38x = 269,987,749,442.89
5. Step 5: Solve for x
   x = 269,987,749,442.89/672,419.38
6. Step 6: Final answer
   x = 401,516.91