Finding the Fourth Proportional to 1,087.88, 1,632.59 and 677.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.88 : 1,632.59 = 677.30 : x
2. Step 2: Convert to fraction form
   1,087.88/1,632.59 = 677.30/x
3. Step 3: Cross multiply
   1,087.88x = 1,632.59 × 677.30
4. Step 4: Simplify right side
   1,087.88x = 1,105,758.98
5. Step 5: Solve for x
   x = 1,105,758.98/1,087.88
6. Step 6: Final answer
   x = 1,016.43