Finding the Fourth Proportional to 3,936.67, 5,431.89 and 2,364.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.67 : 5,431.89 = 2,364.79 : x
2. Step 2: Convert to fraction form
   3,936.67/5,431.89 = 2,364.79/x
3. Step 3: Cross multiply
   3,936.67x = 5,431.89 × 2,364.79
4. Step 4: Simplify right side
   3,936.67x = 12,845,279.15
5. Step 5: Solve for x
   x = 12,845,279.15/3,936.67
6. Step 6: Final answer
   x = 3,262.98