Finding the Fourth Proportional to 2,217.76, 3,326.69 and 830.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.76 : 3,326.69 = 830.83 : x
2. Step 2: Convert to fraction form
   2,217.76/3,326.69 = 830.83/x
3. Step 3: Cross multiply
   2,217.76x = 3,326.69 × 830.83
4. Step 4: Simplify right side
   2,217.76x = 2,763,907.61
5. Step 5: Solve for x
   x = 2,763,907.61/2,217.76
6. Step 6: Final answer
   x = 1,246.26