Finding the Fourth Proportional to 356,384.04, 491,809.89 and 213,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   356,384.04 : 491,809.89 = 213,144.09 : x
2. Step 2: Convert to fraction form
   356,384.04/491,809.89 = 213,144.09/x
3. Step 3: Cross multiply
   356,384.04x = 491,809.89 × 213,144.09
4. Step 4: Simplify right side
   356,384.04x = 104,826,371,457.05
5. Step 5: Solve for x
   x = 104,826,371,457.05/356,384.04
6. Step 6: Final answer
   x = 294,138.79