Finding the Fourth Proportional to 2,104.22, 2,904.03 and 1,172.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.22 : 2,904.03 = 1,172.78 : x
2. Step 2: Convert to fraction form
   2,104.22/2,904.03 = 1,172.78/x
3. Step 3: Cross multiply
   2,104.22x = 2,904.03 × 1,172.78
4. Step 4: Simplify right side
   2,104.22x = 3,405,788.30
5. Step 5: Solve for x
   x = 3,405,788.30/2,104.22
6. Step 6: Final answer
   x = 1,618.55