Finding the Fourth Proportional to 395,085.06, 545,218.83 and 213,796.98

Step by Step Solution

1. Step 1: Write the proportion equation
   395,085.06 : 545,218.83 = 213,796.98 : x
2. Step 2: Convert to fraction form
   395,085.06/545,218.83 = 213,796.98/x
3. Step 3: Cross multiply
   395,085.06x = 545,218.83 × 213,796.98
4. Step 4: Simplify right side
   395,085.06x = 116,566,135,498.05
5. Step 5: Solve for x
   x = 116,566,135,498.05/395,085.06
6. Step 6: Final answer
   x = 295,040.61