Finding the Fourth Proportional to 401,758.72, 554,340.43 and 231,894.43

Step by Step Solution

1. Step 1: Write the proportion equation
   401,758.72 : 554,340.43 = 231,894.43 : x
2. Step 2: Convert to fraction form
   401,758.72/554,340.43 = 231,894.43/x
3. Step 3: Cross multiply
   401,758.72x = 554,340.43 × 231,894.43
4. Step 4: Simplify right side
   401,758.72x = 128,548,456,881.33
5. Step 5: Solve for x
   x = 128,548,456,881.33/401,758.72
6. Step 6: Final answer
   x = 319,964.32