Finding the Fourth Proportional to 282,100.10, 395,989.90 and 282,100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   282,100.10 : 395,989.90 = 282,100.10 : x
2. Step 2: Convert to fraction form
   282,100.10/395,989.90 = 282,100.10/x
3. Step 3: Cross multiply
   282,100.10x = 395,989.90 × 282,100.10
4. Step 4: Simplify right side
   282,100.10x = 111,708,790,388.99
5. Step 5: Solve for x
   x = 111,708,790,388.99/282,100.10
6. Step 6: Final answer
   x = 395,989.90