Finding the Fourth Proportional to 2,651.76, 3,978.68 and 1,190.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.76 : 3,978.68 = 1,190.58 : x
2. Step 2: Convert to fraction form
   2,651.76/3,978.68 = 1,190.58/x
3. Step 3: Cross multiply
   2,651.76x = 3,978.68 × 1,190.58
4. Step 4: Simplify right side
   2,651.76x = 4,736,930.88
5. Step 5: Solve for x
   x = 4,736,930.88/2,651.76
6. Step 6: Final answer
   x = 1,786.33