Finding the Fourth Proportional to 3,402.80, 5,105 and 1,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,402.80 : 5,105 = 1,062.72 : x
2. Step 2: Convert to fraction form
   3,402.80/5,105 = 1,062.72/x
3. Step 3: Cross multiply
   3,402.80x = 5,105 × 1,062.72
4. Step 4: Simplify right side
   3,402.80x = 5,425,185.60
5. Step 5: Solve for x
   x = 5,425,185.60/3,402.80
6. Step 6: Final answer
   x = 1,594.33