Finding the Fourth Proportional to 51,590.72, 71,207.85 and 31,458.69

Step by Step Solution

1. Step 1: Write the proportion equation
   51,590.72 : 71,207.85 = 31,458.69 : x
2. Step 2: Convert to fraction form
   51,590.72/71,207.85 = 31,458.69/x
3. Step 3: Cross multiply
   51,590.72x = 71,207.85 × 31,458.69
4. Step 4: Simplify right side
   51,590.72x = 2,240,105,678.72
5. Step 5: Solve for x
   x = 2,240,105,678.72/51,590.72
6. Step 6: Final answer
   x = 43,420.71