Finding the Fourth Proportional to 2,891.30, 4,339.78 and 1,248.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.30 : 4,339.78 = 1,248.41 : x
2. Step 2: Convert to fraction form
   2,891.30/4,339.78 = 1,248.41/x
3. Step 3: Cross multiply
   2,891.30x = 4,339.78 × 1,248.41
4. Step 4: Simplify right side
   2,891.30x = 5,417,832.48
5. Step 5: Solve for x
   x = 5,417,832.48/2,891.30
6. Step 6: Final answer
   x = 1,873.84