Finding the Fourth Proportional to 1,141.31, 1,711.98 and 881.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.31 : 1,711.98 = 881.71 : x
2. Step 2: Convert to fraction form
   1,141.31/1,711.98 = 881.71/x
3. Step 3: Cross multiply
   1,141.31x = 1,711.98 × 881.71
4. Step 4: Simplify right side
   1,141.31x = 1,509,465.61
5. Step 5: Solve for x
   x = 1,509,465.61/1,141.31
6. Step 6: Final answer
   x = 1,322.57