Finding the Fourth Proportional to 2,104.86, 3,154.88 and 1,272.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.86 : 3,154.88 = 1,272.10 : x
2. Step 2: Convert to fraction form
   2,104.86/3,154.88 = 1,272.10/x
3. Step 3: Cross multiply
   2,104.86x = 3,154.88 × 1,272.10
4. Step 4: Simplify right side
   2,104.86x = 4,013,322.85
5. Step 5: Solve for x
   x = 4,013,322.85/2,104.86
6. Step 6: Final answer
   x = 1,906.69