Finding the Fourth Proportional to 2,189.52, 3,021.42 and 1,245.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.52 : 3,021.42 = 1,245.18 : x
2. Step 2: Convert to fraction form
   2,189.52/3,021.42 = 1,245.18/x
3. Step 3: Cross multiply
   2,189.52x = 3,021.42 × 1,245.18
4. Step 4: Simplify right side
   2,189.52x = 3,762,211.76
5. Step 5: Solve for x
   x = 3,762,211.76/2,189.52
6. Step 6: Final answer
   x = 1,718.28