Finding the Fourth Proportional to 1,288.73, 1,778.48 and 758.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.73 : 1,778.48 = 758.00 : x
2. Step 2: Convert to fraction form
   1,288.73/1,778.48 = 758.00/x
3. Step 3: Cross multiply
   1,288.73x = 1,778.48 × 758.00
4. Step 4: Simplify right side
   1,288.73x = 1,348,075.16
5. Step 5: Solve for x
   x = 1,348,075.16/1,288.73
6. Step 6: Final answer
   x = 1,046.05