Finding the Fourth Proportional to 1,131.82, 1,561.33 and 711.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.82 : 1,561.33 = 711.38 : x
2. Step 2: Convert to fraction form
   1,131.82/1,561.33 = 711.38/x
3. Step 3: Cross multiply
   1,131.82x = 1,561.33 × 711.38
4. Step 4: Simplify right side
   1,131.82x = 1,110,699.73
5. Step 5: Solve for x
   x = 1,110,699.73/1,131.82
6. Step 6: Final answer
   x = 981.34