Finding the Fourth Proportional to 3,086.80, 4,631.01 and 1,139.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.80 : 4,631.01 = 1,139.02 : x
2. Step 2: Convert to fraction form
   3,086.80/4,631.01 = 1,139.02/x
3. Step 3: Cross multiply
   3,086.80x = 4,631.01 × 1,139.02
4. Step 4: Simplify right side
   3,086.80x = 5,274,813.01
5. Step 5: Solve for x
   x = 5,274,813.01/3,086.80
6. Step 6: Final answer
   x = 1,708.83