Finding the Fourth Proportional to 282,355.38, 389,656.71 and 155,031.48

Step by Step Solution

1. Step 1: Write the proportion equation
   282,355.38 : 389,656.71 = 155,031.48 : x
2. Step 2: Convert to fraction form
   282,355.38/389,656.71 = 155,031.48/x
3. Step 3: Cross multiply
   282,355.38x = 389,656.71 × 155,031.48
4. Step 4: Simplify right side
   282,355.38x = 60,409,056,443.23
5. Step 5: Solve for x
   x = 60,409,056,443.23/282,355.38
6. Step 6: Final answer
   x = 213,946.89