Finding the Fourth Proportional to 1,179.36, 1,764.72 and 1,087.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.36 : 1,764.72 = 1,087.56 : x
2. Step 2: Convert to fraction form
   1,179.36/1,764.72 = 1,087.56/x
3. Step 3: Cross multiply
   1,179.36x = 1,764.72 × 1,087.56
4. Step 4: Simplify right side
   1,179.36x = 1,919,238.88
5. Step 5: Solve for x
   x = 1,919,238.88/1,179.36
6. Step 6: Final answer
   x = 1,627.36