Finding the Fourth Proportional to 3,314.16, 4,961.52 and 2,215.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,314.16 : 4,961.52 = 2,215.80 : x
2. Step 2: Convert to fraction form
   3,314.16/4,961.52 = 2,215.80/x
3. Step 3: Cross multiply
   3,314.16x = 4,961.52 × 2,215.80
4. Step 4: Simplify right side
   3,314.16x = 10,993,736.02
5. Step 5: Solve for x
   x = 10,993,736.02/3,314.16
6. Step 6: Final answer
   x = 3,317.20