Finding the Fourth Proportional to 2,543.37, 3,507.91 and 2,189.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.37 : 3,507.91 = 2,189.87 : x
2. Step 2: Convert to fraction form
   2,543.37/3,507.91 = 2,189.87/x
3. Step 3: Cross multiply
   2,543.37x = 3,507.91 × 2,189.87
4. Step 4: Simplify right side
   2,543.37x = 7,681,857.01
5. Step 5: Solve for x
   x = 7,681,857.01/2,543.37
6. Step 6: Final answer
   x = 3,020.35