Finding the Fourth Proportional to 395,111.51, 545,253.83 and 213,823.43

Step by Step Solution

1. Step 1: Write the proportion equation
   395,111.51 : 545,253.83 = 213,823.43 : x
2. Step 2: Convert to fraction form
   395,111.51/545,253.83 = 213,823.43/x
3. Step 3: Cross multiply
   395,111.51x = 545,253.83 × 213,823.43
4. Step 4: Simplify right side
   395,111.51x = 116,588,040,355.85
5. Step 5: Solve for x
   x = 116,588,040,355.85/395,111.51
6. Step 6: Final answer
   x = 295,076.30