Finding the Fourth Proportional to 2,216.02, 3,322.17 and 918.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.02 : 3,322.17 = 918.40 : x
2. Step 2: Convert to fraction form
   2,216.02/3,322.17 = 918.40/x
3. Step 3: Cross multiply
   2,216.02x = 3,322.17 × 918.40
4. Step 4: Simplify right side
   2,216.02x = 3,051,080.93
5. Step 5: Solve for x
   x = 3,051,080.93/2,216.02
6. Step 6: Final answer
   x = 1,376.83