Finding the Fourth Proportional to 1,191.31, 1,778.82 and 1,067.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.31 : 1,778.82 = 1,067.11 : x
2. Step 2: Convert to fraction form
   1,191.31/1,778.82 = 1,067.11/x
3. Step 3: Cross multiply
   1,191.31x = 1,778.82 × 1,067.11
4. Step 4: Simplify right side
   1,191.31x = 1,898,193.94
5. Step 5: Solve for x
   x = 1,898,193.94/1,191.31
6. Step 6: Final answer
   x = 1,593.37