Finding the Fourth Proportional to 282,978.76, 390,502.46 and 155,654.32

Step by Step Solution

1. Step 1: Write the proportion equation
   282,978.76 : 390,502.46 = 155,654.32 : x
2. Step 2: Convert to fraction form
   282,978.76/390,502.46 = 155,654.32/x
3. Step 3: Cross multiply
   282,978.76x = 390,502.46 × 155,654.32
4. Step 4: Simplify right side
   282,978.76x = 60,783,394,869.63
5. Step 5: Solve for x
   x = 60,783,394,869.63/282,978.76
6. Step 6: Final answer
   x = 214,798.44