Finding the Fourth Proportional to 4,870.63, 6,725.78 and 3,081.39

Step by Step Solution

1. Step 1: Write the proportion equation
   4,870.63 : 6,725.78 = 3,081.39 : x
2. Step 2: Convert to fraction form
   4,870.63/6,725.78 = 3,081.39/x
3. Step 3: Cross multiply
   4,870.63x = 6,725.78 × 3,081.39
4. Step 4: Simplify right side
   4,870.63x = 20,724,777.33
5. Step 5: Solve for x
   x = 20,724,777.33/4,870.63
6. Step 6: Final answer
   x = 4,255.05