Finding the Fourth Proportional to 2,658.59, 3,987.85 and 1,196.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.59 : 3,987.85 = 1,196.70 : x
2. Step 2: Convert to fraction form
   2,658.59/3,987.85 = 1,196.70/x
3. Step 3: Cross multiply
   2,658.59x = 3,987.85 × 1,196.70
4. Step 4: Simplify right side
   2,658.59x = 4,772,257.10
5. Step 5: Solve for x
   x = 4,772,257.10/2,658.59
6. Step 6: Final answer
   x = 1,795.04