Finding the Fourth Proportional to 2,188.48, 3,020.98 and 1,490.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.48 : 3,020.98 = 1,490.28 : x
2. Step 2: Convert to fraction form
   2,188.48/3,020.98 = 1,490.28/x
3. Step 3: Cross multiply
   2,188.48x = 3,020.98 × 1,490.28
4. Step 4: Simplify right side
   2,188.48x = 4,502,106.07
5. Step 5: Solve for x
   x = 4,502,106.07/2,188.48
6. Step 6: Final answer
   x = 2,057.18