Finding the Fourth Proportional to 2,087.86, 3,132.06 and 789.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.86 : 3,132.06 = 789.70 : x
2. Step 2: Convert to fraction form
   2,087.86/3,132.06 = 789.70/x
3. Step 3: Cross multiply
   2,087.86x = 3,132.06 × 789.70
4. Step 4: Simplify right side
   2,087.86x = 2,473,387.78
5. Step 5: Solve for x
   x = 2,473,387.78/2,087.86
6. Step 6: Final answer
   x = 1,184.65