Finding the Fourth Proportional to 243,540.27, 365,155.63 and 213,614.58

Step by Step Solution

1. Step 1: Write the proportion equation
   243,540.27 : 365,155.63 = 213,614.58 : x
2. Step 2: Convert to fraction form
   243,540.27/365,155.63 = 213,614.58/x
3. Step 3: Cross multiply
   243,540.27x = 365,155.63 × 213,614.58
4. Step 4: Simplify right side
   243,540.27x = 78,002,567,372.38
5. Step 5: Solve for x
   x = 78,002,567,372.38/243,540.27
6. Step 6: Final answer
   x = 320,286.12