Finding the Fourth Proportional to 261,054.69, 391,582.38 and 71,516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   261,054.69 : 391,582.38 = 71,516.72 : x
2. Step 2: Convert to fraction form
   261,054.69/391,582.38 = 71,516.72/x
3. Step 3: Cross multiply
   261,054.69x = 391,582.38 × 71,516.72
4. Step 4: Simplify right side
   261,054.69x = 28,004,685,469.48
5. Step 5: Solve for x
   x = 28,004,685,469.48/261,054.69
6. Step 6: Final answer
   x = 107,275.17