Finding the Fourth Proportional to 3,109.27, 4,663.91 and 1,260.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.27 : 4,663.91 = 1,260.42 : x
2. Step 2: Convert to fraction form
   3,109.27/4,663.91 = 1,260.42/x
3. Step 3: Cross multiply
   3,109.27x = 4,663.91 × 1,260.42
4. Step 4: Simplify right side
   3,109.27x = 5,878,462.12
5. Step 5: Solve for x
   x = 5,878,462.12/3,109.27
6. Step 6: Final answer
   x = 1,890.63