Finding the Fourth Proportional to 51,689.98, 71,327.82 and 31,279.69

Step by Step Solution

1. Step 1: Write the proportion equation
   51,689.98 : 71,327.82 = 31,279.69 : x
2. Step 2: Convert to fraction form
   51,689.98/71,327.82 = 31,279.69/x
3. Step 3: Cross multiply
   51,689.98x = 71,327.82 × 31,279.69
4. Step 4: Simplify right side
   51,689.98x = 2,231,112,097.98
5. Step 5: Solve for x
   x = 2,231,112,097.98/51,689.98
6. Step 6: Final answer
   x = 43,163.34