Finding the Fourth Proportional to 2,086.94, 3,130.95 and 788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.94 : 3,130.95 = 788.42 : x
2. Step 2: Convert to fraction form
   2,086.94/3,130.95 = 788.42/x
3. Step 3: Cross multiply
   2,086.94x = 3,130.95 × 788.42
4. Step 4: Simplify right side
   2,086.94x = 2,468,487.94
5. Step 5: Solve for x
   x = 2,468,487.94/2,086.94
6. Step 6: Final answer
   x = 1,182.83