Finding the Fourth Proportional to 282,019.50, 389,186.91 and 154,695.39

Step by Step Solution

1. Step 1: Write the proportion equation
   282,019.50 : 389,186.91 = 154,695.39 : x
2. Step 2: Convert to fraction form
   282,019.50/389,186.91 = 154,695.39/x
3. Step 3: Cross multiply
   282,019.50x = 389,186.91 × 154,695.39
4. Step 4: Simplify right side
   282,019.50x = 60,205,420,825.34
5. Step 5: Solve for x
   x = 60,205,420,825.34/282,019.50
6. Step 6: Final answer
   x = 213,479.64