Finding the Fourth Proportional to 2,561.88, 3,839.94 and 1,191

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.88 : 3,839.94 = 1,191 : x
2. Step 2: Convert to fraction form
   2,561.88/3,839.94 = 1,191/x
3. Step 3: Cross multiply
   2,561.88x = 3,839.94 × 1,191
4. Step 4: Simplify right side
   2,561.88x = 4,573,368.54
5. Step 5: Solve for x
   x = 4,573,368.54/2,561.88
6. Step 6: Final answer
   x = 1,785.16