Finding the Fourth Proportional to 2,659.58, 3,988.72 and 1,177.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.58 : 3,988.72 = 1,177.98 : x
2. Step 2: Convert to fraction form
   2,659.58/3,988.72 = 1,177.98/x
3. Step 3: Cross multiply
   2,659.58x = 3,988.72 × 1,177.98
4. Step 4: Simplify right side
   2,659.58x = 4,698,626.38
5. Step 5: Solve for x
   x = 4,698,626.38/2,659.58
6. Step 6: Final answer
   x = 1,766.68