Finding the Fourth Proportional to 1,758.42, 2,427.03 and 1,128.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,758.42 : 2,427.03 = 1,128.78 : x
2. Step 2: Convert to fraction form
   1,758.42/2,427.03 = 1,128.78/x
3. Step 3: Cross multiply
   1,758.42x = 2,427.03 × 1,128.78
4. Step 4: Simplify right side
   1,758.42x = 2,739,582.92
5. Step 5: Solve for x
   x = 2,739,582.92/1,758.42
6. Step 6: Final answer
   x = 1,557.98