Finding the Fourth Proportional to 282,443.18, 389,771.15 and 155,118.78

Step by Step Solution

1. Step 1: Write the proportion equation
   282,443.18 : 389,771.15 = 155,118.78 : x
2. Step 2: Convert to fraction form
   282,443.18/389,771.15 = 155,118.78/x
3. Step 3: Cross multiply
   282,443.18x = 389,771.15 × 155,118.78
4. Step 4: Simplify right side
   282,443.18x = 60,460,824,491.60
5. Step 5: Solve for x
   x = 60,460,824,491.60/282,443.18
6. Step 6: Final answer
   x = 214,063.68