Finding the Fourth Proportional to 3,421.51, 5,131.05 and 1,080.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.51 : 5,131.05 = 1,080.82 : x
2. Step 2: Convert to fraction form
   3,421.51/5,131.05 = 1,080.82/x
3. Step 3: Cross multiply
   3,421.51x = 5,131.05 × 1,080.82
4. Step 4: Simplify right side
   3,421.51x = 5,545,741.46
5. Step 5: Solve for x
   x = 5,545,741.46/3,421.51
6. Step 6: Final answer
   x = 1,620.85