Finding the Fourth Proportional to 2,891.10, 4,335.77 and 1,247.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.10 : 4,335.77 = 1,247.34 : x
2. Step 2: Convert to fraction form
   2,891.10/4,335.77 = 1,247.34/x
3. Step 3: Cross multiply
   2,891.10x = 4,335.77 × 1,247.34
4. Step 4: Simplify right side
   2,891.10x = 5,408,182.47
5. Step 5: Solve for x
   x = 5,408,182.47/2,891.10
6. Step 6: Final answer
   x = 1,870.63