Finding the Fourth Proportional to 2,216.22, 3,322.98 and 916.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.22 : 3,322.98 = 916.08 : x
2. Step 2: Convert to fraction form
   2,216.22/3,322.98 = 916.08/x
3. Step 3: Cross multiply
   2,216.22x = 3,322.98 × 916.08
4. Step 4: Simplify right side
   2,216.22x = 3,044,115.52
5. Step 5: Solve for x
   x = 3,044,115.52/2,216.22
6. Step 6: Final answer
   x = 1,373.56