Finding the Fourth Proportional to 243,074.72, 335,336.31 and 231,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,074.72 : 335,336.31 = 231,818.50 : x
2. Step 2: Convert to fraction form
   243,074.72/335,336.31 = 231,818.50/x
3. Step 3: Cross multiply
   243,074.72x = 335,336.31 × 231,818.50
4. Step 4: Simplify right side
   243,074.72x = 77,737,160,379.74
5. Step 5: Solve for x
   x = 77,737,160,379.74/243,074.72
6. Step 6: Final answer
   x = 319,807.67