Finding the Fourth Proportional to 321,304.39, 442,846.61 and 213,682.12

Step by Step Solution

1. Step 1: Write the proportion equation
   321,304.39 : 442,846.61 = 213,682.12 : x
2. Step 2: Convert to fraction form
   321,304.39/442,846.61 = 213,682.12/x
3. Step 3: Cross multiply
   321,304.39x = 442,846.61 × 213,682.12
4. Step 4: Simplify right side
   321,304.39x = 94,628,401,085.39
5. Step 5: Solve for x
   x = 94,628,401,085.39/321,304.39
6. Step 6: Final answer
   x = 294,513.26