Finding the Fourth Proportional to 3,420.37, 5,131.23 and 1,080.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,420.37 : 5,131.23 = 1,080.96 : x
2. Step 2: Convert to fraction form
   3,420.37/5,131.23 = 1,080.96/x
3. Step 3: Cross multiply
   3,420.37x = 5,131.23 × 1,080.96
4. Step 4: Simplify right side
   3,420.37x = 5,546,654.38
5. Step 5: Solve for x
   x = 5,546,654.38/3,420.37
6. Step 6: Final answer
   x = 1,621.65