Finding the Fourth Proportional to 371,996.34, 512,443.83 and 269,721.30

Step by Step Solution

1. Step 1: Write the proportion equation
   371,996.34 : 512,443.83 = 269,721.30 : x
2. Step 2: Convert to fraction form
   371,996.34/512,443.83 = 269,721.30/x
3. Step 3: Cross multiply
   371,996.34x = 512,443.83 × 269,721.30
4. Step 4: Simplify right side
   371,996.34x = 138,217,016,004.58
5. Step 5: Solve for x
   x = 138,217,016,004.58/371,996.34
6. Step 6: Final answer
   x = 371,554.77