Finding the Fourth Proportional to 2,651.16, 3,978.76 and 1,191.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.16 : 3,978.76 = 1,191.54 : x
2. Step 2: Convert to fraction form
   2,651.16/3,978.76 = 1,191.54/x
3. Step 3: Cross multiply
   2,651.16x = 3,978.76 × 1,191.54
4. Step 4: Simplify right side
   2,651.16x = 4,740,851.69
5. Step 5: Solve for x
   x = 4,740,851.69/2,651.16
6. Step 6: Final answer
   x = 1,788.22