Finding the Fourth Proportional to 282,488.45, 389,840.78 and 155,166.71

Step by Step Solution

1. Step 1: Write the proportion equation
   282,488.45 : 389,840.78 = 155,166.71 : x
2. Step 2: Convert to fraction form
   282,488.45/389,840.78 = 155,166.71/x
3. Step 3: Cross multiply
   282,488.45x = 389,840.78 × 155,166.71
4. Step 4: Simplify right side
   282,488.45x = 60,490,309,695.15
5. Step 5: Solve for x
   x = 60,490,309,695.15/282,488.45
6. Step 6: Final answer
   x = 214,133.75