Finding the Fourth Proportional to 456,306.72, 629,044.56 and 312,839.52

Step by Step Solution

1. Step 1: Write the proportion equation
   456,306.72 : 629,044.56 = 312,839.52 : x
2. Step 2: Convert to fraction form
   456,306.72/629,044.56 = 312,839.52/x
3. Step 3: Cross multiply
   456,306.72x = 629,044.56 × 312,839.52
4. Step 4: Simplify right side
   456,306.72x = 196,789,998,209.01
5. Step 5: Solve for x
   x = 196,789,998,209.01/456,306.72
6. Step 6: Final answer
   x = 431,266.93