Finding the Fourth Proportional to 282,321.59, 389,604.46 and 155,005.39

Step by Step Solution

1. Step 1: Write the proportion equation
   282,321.59 : 389,604.46 = 155,005.39 : x
2. Step 2: Convert to fraction form
   282,321.59/389,604.46 = 155,005.39/x
3. Step 3: Cross multiply
   282,321.59x = 389,604.46 × 155,005.39
4. Step 4: Simplify right side
   282,321.59x = 60,390,789,906.51
5. Step 5: Solve for x
   x = 60,390,789,906.51/282,321.59
6. Step 6: Final answer
   x = 213,907.80