Finding the Fourth Proportional to 261,321.72, 391,981.12 and 95,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   261,321.72 : 391,981.12 = 95,109.72 : x
2. Step 2: Convert to fraction form
   261,321.72/391,981.12 = 95,109.72/x
3. Step 3: Cross multiply
   261,321.72x = 391,981.12 × 95,109.72
4. Step 4: Simplify right side
   261,321.72x = 37,281,214,568.49
5. Step 5: Solve for x
   x = 37,281,214,568.49/261,321.72
6. Step 6: Final answer
   x = 142,664.05