Finding the Fourth Proportional to 2,189.86, 3,022.10 and 1,245.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.86 : 3,022.10 = 1,245.82 : x
2. Step 2: Convert to fraction form
   2,189.86/3,022.10 = 1,245.82/x
3. Step 3: Cross multiply
   2,189.86x = 3,022.10 × 1,245.82
4. Step 4: Simplify right side
   2,189.86x = 3,764,987.29
5. Step 5: Solve for x
   x = 3,764,987.29/2,189.86
6. Step 6: Final answer
   x = 1,719.28