Finding the Fourth Proportional to 1,488.38, 2,054.36 and 1,022.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.38 : 2,054.36 = 1,022.63 : x
2. Step 2: Convert to fraction form
   1,488.38/2,054.36 = 1,022.63/x
3. Step 3: Cross multiply
   1,488.38x = 2,054.36 × 1,022.63
4. Step 4: Simplify right side
   1,488.38x = 2,100,842.45
5. Step 5: Solve for x
   x = 2,100,842.45/1,488.38
6. Step 6: Final answer
   x = 1,411.50