Finding the Fourth Proportional to 2,189.47, 3,020.61 and 1,348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.47 : 3,020.61 = 1,348.72 : x
2. Step 2: Convert to fraction form
   2,189.47/3,020.61 = 1,348.72/x
3. Step 3: Cross multiply
   2,189.47x = 3,020.61 × 1,348.72
4. Step 4: Simplify right side
   2,189.47x = 4,073,957.12
5. Step 5: Solve for x
   x = 4,073,957.12/2,189.47
6. Step 6: Final answer
   x = 1,860.70