Finding the Fourth Proportional to 2,189.31, 3,017.63 and 1,691.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.31 : 3,017.63 = 1,691.16 : x
2. Step 2: Convert to fraction form
   2,189.31/3,017.63 = 1,691.16/x
3. Step 3: Cross multiply
   2,189.31x = 3,017.63 × 1,691.16
4. Step 4: Simplify right side
   2,189.31x = 5,103,286.70
5. Step 5: Solve for x
   x = 5,103,286.70/2,189.31
6. Step 6: Final answer
   x = 2,331.00