Finding the Fourth Proportional to 2,216.82, 3,325.05 and 830.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.82 : 3,325.05 = 830.10 : x
2. Step 2: Convert to fraction form
   2,216.82/3,325.05 = 830.10/x
3. Step 3: Cross multiply
   2,216.82x = 3,325.05 × 830.10
4. Step 4: Simplify right side
   2,216.82x = 2,760,124.01
5. Step 5: Solve for x
   x = 2,760,124.01/2,216.82
6. Step 6: Final answer
   x = 1,245.08