Finding the Fourth Proportional to 2,215.37, 3,321.14 and 981.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.37 : 3,321.14 = 981.83 : x
2. Step 2: Convert to fraction form
   2,215.37/3,321.14 = 981.83/x
3. Step 3: Cross multiply
   2,215.37x = 3,321.14 × 981.83
4. Step 4: Simplify right side
   2,215.37x = 3,260,794.89
5. Step 5: Solve for x
   x = 3,260,794.89/2,215.37
6. Step 6: Final answer
   x = 1,471.90