Finding the Fourth Proportional to 2,188.42, 3,018 and 1,969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.42 : 3,018 = 1,969.72 : x
2. Step 2: Convert to fraction form
   2,188.42/3,018 = 1,969.72/x
3. Step 3: Cross multiply
   2,188.42x = 3,018 × 1,969.72
4. Step 4: Simplify right side
   2,188.42x = 5,944,614.96
5. Step 5: Solve for x
   x = 5,944,614.96/2,188.42
6. Step 6: Final answer
   x = 2,716.40