Finding the Fourth Proportional to 282,783.27, 390,215.84 and 155,456.13

Step by Step Solution

1. Step 1: Write the proportion equation
   282,783.27 : 390,215.84 = 155,456.13 : x
2. Step 2: Convert to fraction form
   282,783.27/390,215.84 = 155,456.13/x
3. Step 3: Cross multiply
   282,783.27x = 390,215.84 × 155,456.13
4. Step 4: Simplify right side
   282,783.27x = 60,661,443,573.82
5. Step 5: Solve for x
   x = 60,661,443,573.82/282,783.27
6. Step 6: Final answer
   x = 214,515.67