Finding the Fourth Proportional to 3,139.59, 4,710.16 and 2,216.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.59 : 4,710.16 = 2,216.96 : x
2. Step 2: Convert to fraction form
   3,139.59/4,710.16 = 2,216.96/x
3. Step 3: Cross multiply
   3,139.59x = 4,710.16 × 2,216.96
4. Step 4: Simplify right side
   3,139.59x = 10,442,212.76
5. Step 5: Solve for x
   x = 10,442,212.76/3,139.59
6. Step 6: Final answer
   x = 3,325.98