Finding the Fourth Proportional to 282,627.69, 390,021.78 and 155,300.55

Step by Step Solution

1. Step 1: Write the proportion equation
   282,627.69 : 390,021.78 = 155,300.55 : x
2. Step 2: Convert to fraction form
   282,627.69/390,021.78 = 155,300.55/x
3. Step 3: Cross multiply
   282,627.69x = 390,021.78 × 155,300.55
4. Step 4: Simplify right side
   282,627.69x = 60,570,596,945.98
5. Step 5: Solve for x
   x = 60,570,596,945.98/282,627.69
6. Step 6: Final answer
   x = 214,312.32