Finding the Fourth Proportional to 282,678.25, 390,095.99 and 155,362.05

Step by Step Solution

1. Step 1: Write the proportion equation
   282,678.25 : 390,095.99 = 155,362.05 : x
2. Step 2: Convert to fraction form
   282,678.25/390,095.99 = 155,362.05/x
3. Step 3: Cross multiply
   282,678.25x = 390,095.99 × 155,362.05
4. Step 4: Simplify right side
   282,678.25x = 60,606,109,975.89
5. Step 5: Solve for x
   x = 60,606,109,975.89/282,678.25
6. Step 6: Final answer
   x = 214,399.62