Finding the Fourth Proportional to 2,176.05, 3,002.91 and 1,291.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.05 : 3,002.91 = 1,291.89 : x
2. Step 2: Convert to fraction form
   2,176.05/3,002.91 = 1,291.89/x
3. Step 3: Cross multiply
   2,176.05x = 3,002.91 × 1,291.89
4. Step 4: Simplify right side
   2,176.05x = 3,879,429.40
5. Step 5: Solve for x
   x = 3,879,429.40/2,176.05
6. Step 6: Final answer
   x = 1,782.79