Finding the Fourth Proportional to 3,425.90, 5,139.05 and 1,086.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,425.90 : 5,139.05 = 1,086.01 : x
2. Step 2: Convert to fraction form
   3,425.90/5,139.05 = 1,086.01/x
3. Step 3: Cross multiply
   3,425.90x = 5,139.05 × 1,086.01
4. Step 4: Simplify right side
   3,425.90x = 5,581,041.41
5. Step 5: Solve for x
   x = 5,581,041.41/3,425.90
6. Step 6: Final answer
   x = 1,629.08