Finding the Fourth Proportional to 395,499.25, 593,458.05 and 215,714.47

Step by Step Solution

1. Step 1: Write the proportion equation
   395,499.25 : 593,458.05 = 215,714.47 : x
2. Step 2: Convert to fraction form
   395,499.25/593,458.05 = 215,714.47/x
3. Step 3: Cross multiply
   395,499.25x = 593,458.05 × 215,714.47
4. Step 4: Simplify right side
   395,499.25x = 128,017,488,722.98
5. Step 5: Solve for x
   x = 128,017,488,722.98/395,499.25
6. Step 6: Final answer
   x = 323,685.79