Finding the Fourth Proportional to 282,870.24, 390,362.32 and 155,554.08

Step by Step Solution

1. Step 1: Write the proportion equation
   282,870.24 : 390,362.32 = 155,554.08 : x
2. Step 2: Convert to fraction form
   282,870.24/390,362.32 = 155,554.08/x
3. Step 3: Cross multiply
   282,870.24x = 390,362.32 × 155,554.08
4. Step 4: Simplify right side
   282,870.24x = 60,722,451,554.27
5. Step 5: Solve for x
   x = 60,722,451,554.27/282,870.24
6. Step 6: Final answer
   x = 214,665.39