Finding the Fourth Proportional to 2,104.32, 2,904.04 and 1,172.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.32 : 2,904.04 = 1,172.88 : x
2. Step 2: Convert to fraction form
   2,104.32/2,904.04 = 1,172.88/x
3. Step 3: Cross multiply
   2,104.32x = 2,904.04 × 1,172.88
4. Step 4: Simplify right side
   2,104.32x = 3,406,090.44
5. Step 5: Solve for x
   x = 3,406,090.44/2,104.32
6. Step 6: Final answer
   x = 1,618.62