Finding the Fourth Proportional to 258,401.04, 356,613.39 and 155,039.10

Step by Step Solution

1. Step 1: Write the proportion equation
   258,401.04 : 356,613.39 = 155,039.10 : x
2. Step 2: Convert to fraction form
   258,401.04/356,613.39 = 155,039.10/x
3. Step 3: Cross multiply
   258,401.04x = 356,613.39 × 155,039.10
4. Step 4: Simplify right side
   258,401.04x = 55,289,019,033.55
5. Step 5: Solve for x
   x = 55,289,019,033.55/258,401.04
6. Step 6: Final answer
   x = 213,965.93