Finding the Fourth Proportional to 2,104.91, 2,904.55 and 1,220.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.91 : 2,904.55 = 1,220.52 : x
2. Step 2: Convert to fraction form
   2,104.91/2,904.55 = 1,220.52/x
3. Step 3: Cross multiply
   2,104.91x = 2,904.55 × 1,220.52
4. Step 4: Simplify right side
   2,104.91x = 3,545,061.37
5. Step 5: Solve for x
   x = 3,545,061.37/2,104.91
6. Step 6: Final answer
   x = 1,684.19