Finding the Fourth Proportional to 1,179.30, 1,768.17 and 659.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.30 : 1,768.17 = 659.35 : x
2. Step 2: Convert to fraction form
   1,179.30/1,768.17 = 659.35/x
3. Step 3: Cross multiply
   1,179.30x = 1,768.17 × 659.35
4. Step 4: Simplify right side
   1,179.30x = 1,165,845.10
5. Step 5: Solve for x
   x = 1,165,845.10/1,179.30
6. Step 6: Final answer
   x = 988.59