Finding the Fourth Proportional to 395,498.50, 593,456.93 and 215,713.72

Step by Step Solution

1. Step 1: Write the proportion equation
   395,498.50 : 593,456.93 = 215,713.72 : x
2. Step 2: Convert to fraction form
   395,498.50/593,456.93 = 215,713.72/x
3. Step 3: Cross multiply
   395,498.50x = 593,456.93 × 215,713.72
4. Step 4: Simplify right side
   395,498.50x = 128,016,800,951.51
5. Step 5: Solve for x
   x = 128,016,800,951.51/395,498.50
6. Step 6: Final answer
   x = 323,684.67