Finding the Fourth Proportional to 2,212.37, 3,320.06 and 913.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.37 : 3,320.06 = 913.83 : x
2. Step 2: Convert to fraction form
   2,212.37/3,320.06 = 913.83/x
3. Step 3: Cross multiply
   2,212.37x = 3,320.06 × 913.83
4. Step 4: Simplify right side
   2,212.37x = 3,033,949.26
5. Step 5: Solve for x
   x = 3,033,949.26/2,212.37
6. Step 6: Final answer
   x = 1,371.36