Finding the Fourth Proportional to 1,483.10, 2,046.90 and 1,128.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.10 : 2,046.90 = 1,128.43 : x
2. Step 2: Convert to fraction form
   1,483.10/2,046.90 = 1,128.43/x
3. Step 3: Cross multiply
   1,483.10x = 2,046.90 × 1,128.43
4. Step 4: Simplify right side
   1,483.10x = 2,309,780.64
5. Step 5: Solve for x
   x = 2,309,780.64/1,483.10
6. Step 6: Final answer
   x = 1,557.40