Finding the Fourth Proportional to 395,016.27, 545,118.56 and 213,724.22

Step by Step Solution

1. Step 1: Write the proportion equation
   395,016.27 : 545,118.56 = 213,724.22 : x
2. Step 2: Convert to fraction form
   395,016.27/545,118.56 = 213,724.22/x
3. Step 3: Cross multiply
   395,016.27x = 545,118.56 × 213,724.22
4. Step 4: Simplify right side
   395,016.27x = 116,505,039,117.07
5. Step 5: Solve for x
   x = 116,505,039,117.07/395,016.27
6. Step 6: Final answer
   x = 294,937.32