Finding the Fourth Proportional to 2,215.16, 3,322.72 and 983.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.16 : 3,322.72 = 983.12 : x
2. Step 2: Convert to fraction form
   2,215.16/3,322.72 = 983.12/x
3. Step 3: Cross multiply
   2,215.16x = 3,322.72 × 983.12
4. Step 4: Simplify right side
   2,215.16x = 3,266,632.49
5. Step 5: Solve for x
   x = 3,266,632.49/2,215.16
6. Step 6: Final answer
   x = 1,474.67