Finding the Fourth Proportional to 4,947.39, 7,416.72 and 2,478.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,947.39 : 7,416.72 = 2,478.69 : x
2. Step 2: Convert to fraction form
   4,947.39/7,416.72 = 2,478.69/x
3. Step 3: Cross multiply
   4,947.39x = 7,416.72 × 2,478.69
4. Step 4: Simplify right side
   4,947.39x = 18,383,749.70
5. Step 5: Solve for x
   x = 18,383,749.70/4,947.39
6. Step 6: Final answer
   x = 3,715.85