Finding the Fourth Proportional to 2,069.76, 3,102.72 and 1,249.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.76 : 3,102.72 = 1,249.92 : x
2. Step 2: Convert to fraction form
   2,069.76/3,102.72 = 1,249.92/x
3. Step 3: Cross multiply
   2,069.76x = 3,102.72 × 1,249.92
4. Step 4: Simplify right side
   2,069.76x = 3,878,151.78
5. Step 5: Solve for x
   x = 3,878,151.78/2,069.76
6. Step 6: Final answer
   x = 1,873.72