Finding the Fourth Proportional to 2,189.16, 3,275.12 and 1,691.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.16 : 3,275.12 = 1,691.70 : x
2. Step 2: Convert to fraction form
   2,189.16/3,275.12 = 1,691.70/x
3. Step 3: Cross multiply
   2,189.16x = 3,275.12 × 1,691.70
4. Step 4: Simplify right side
   2,189.16x = 5,540,520.50
5. Step 5: Solve for x
   x = 5,540,520.50/2,189.16
6. Step 6: Final answer
   x = 2,530.89