Finding the Fourth Proportional to 3,947.86, 5,448.76 and 2,354.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.86 : 5,448.76 = 2,354.61 : x
2. Step 2: Convert to fraction form
   3,947.86/5,448.76 = 2,354.61/x
3. Step 3: Cross multiply
   3,947.86x = 5,448.76 × 2,354.61
4. Step 4: Simplify right side
   3,947.86x = 12,829,704.78
5. Step 5: Solve for x
   x = 12,829,704.78/3,947.86
6. Step 6: Final answer
   x = 3,249.79