Finding the Fourth Proportional to 3,426.36, 5,139.42 and 1,117.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.36 : 5,139.42 = 1,117.88 : x
2. Step 2: Convert to fraction form
   3,426.36/5,139.42 = 1,117.88/x
3. Step 3: Cross multiply
   3,426.36x = 5,139.42 × 1,117.88
4. Step 4: Simplify right side
   3,426.36x = 5,745,254.83
5. Step 5: Solve for x
   x = 5,745,254.83/3,426.36
6. Step 6: Final answer
   x = 1,676.78