Finding the Fourth Proportional to 282,436.62, 389,764.35 and 155,111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   282,436.62 : 389,764.35 = 155,111.10 : x
2. Step 2: Convert to fraction form
   282,436.62/389,764.35 = 155,111.10/x
3. Step 3: Cross multiply
   282,436.62x = 389,764.35 × 155,111.10
4. Step 4: Simplify right side
   282,436.62x = 60,456,777,069.29
5. Step 5: Solve for x
   x = 60,456,777,069.29/282,436.62
6. Step 6: Final answer
   x = 214,054.31