Finding the Fourth Proportional to 2,088.31, 3,131.45 and 789.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.31 : 3,131.45 = 789.88 : x
2. Step 2: Convert to fraction form
   2,088.31/3,131.45 = 789.88/x
3. Step 3: Cross multiply
   2,088.31x = 3,131.45 × 789.88
4. Step 4: Simplify right side
   2,088.31x = 2,473,469.73
5. Step 5: Solve for x
   x = 2,473,469.73/2,088.31
6. Step 6: Final answer
   x = 1,184.44